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Mayline EFO2424433A 4-Post Filing Double Entry - Adder Unit

By Mayline | Mfr#: EFO2424433A | Tiger#: TM79049
  • 4-Post Filing Double Entry - Adder Unit MAYEFO2424433A-
  • MAYEFO2424433A- 4-Post Filing Double Entry - Adder Unit - with adder units


  • Optional Sizes and Number of Tiers 
  • Supports Letter or Legal Size Filing
  • Double Entry Shelves Adjust on 1½" Centers 
  • Easy to Assemble, no Hardware Required
  • 240 lbs Weight Capacity Per Shelf
List Price: $744.00
You Save: $332.12 - 45%
  • Product Options
    Choose Design

    Select Media Type

    Select Openings

    Choose Width

Ships Out Within: 4-6 Weeks

At, we do our best to provide our customers with quality products at the lowest possible price. If you see an item marked with a Price Match Guarantee seal for less on a competitor website, we will meet or beat it! The site be an authorized distributor and the price quoted must be the standard advertised price.

How to Submit a Lower Price

To submit a lower price send us the item number in question, a link to the competitor price page, along with your full name and contact information to As soon as we receive your email, a member of our sales staff will review the information and contact you with a Meet or Beat offer.

For more information, please call us at 877-866-7400.


Please call our Product Specialist to clarify your needs and if you may need more parts.

Dividers are required to complete your Filing Unit Order. Please make your choice HERE

Overview for Mayline EFO2424433A 4-Post Filing Double Entry - Adder Unit

Mayline 4-Post Filing Double Entry - Adder Unit is a highly efficient storage solution that has been designed to specifically address your unique current and future storage needs. Start off with a basic Double Entry unit and build up your storage system using Adder models. With Mayline 4-Post shelving systems you are free to create and alternate your storage space to fit folders, organize files, stock boxes and what not. Experience the benefits of a greater visibility, one-touch file retrieval, simple assembly and a large variety of upgrades.

Model Features
This Mayline Double Entry Adder Unit features two types of uprights: Closed "T" and open "T" that are normally used for the internal support. The shelves are made of a 22-gauge steel that ensures exceptional durability and a weight capacity of 240 lbs per shelf. The uprights are slotted on the sides to allow customizable shelf positioning. Each shelf adjusts on 1.5" along the 4-Post Filing Unit. Double Entry design allows storing and accessing files from both sides of the unit. It has a double-depth for back-to-back storage. This basic model comes without shelf dividers that can be purchased separately if required.

4-Post Filing Double Entry - Adder Unit - Shelving Options Chart
Item #Media DepthOpeningsWidth Design List Price
EFO2424433ALetter24"324"Open 'T' $431
EFO3024433A330"Open 'T' $433
EFO3624433A336"Open 'T' $433
EFO4224433A342"Open 'T' $476
EFT2424433A324"Closed 'T' $502
EFT3024433A330"Closed 'T' $504
EFT3624433A336"Closed 'T' $504
EFO4824433A348"Open 'T' $534
EFT4224433A342"Closed 'T' $547
EFT4824433A348"Closed 'T' $605
EFO2424656A624"Open 'T' $701
EFO3024656A630"Open 'T' $703
EFO3624656A636"Open 'T' $703
EFT2424656A624"Closed 'T' $782
EFT3024656A630"Closed 'T' $784
EFT3624656A636"Closed 'T' $784
EFO4224656A642"Open 'T' $795
EFO2424767A724"Open 'T' $803
EFO3024767A730"Open 'T' $805
EFO3624767A736"Open 'T' $805
EFT4224656A642"Closed 'T' $876
EFO4824656A648"Open 'T' $894
EFO2424868A824"Open 'T' $898
EFO4224767A742"Open 'T' $900
EFO3024868A830"Open 'T' $900
EFO3624868A836"Open 'T' $900
EFT2424767A724"Closed 'T' $902
EFT3024767A730"Closed 'T' $904
EFT3624767A736"Closed 'T' $904
EFO2424979A924"Open 'T' $989
EFO3024979A930"Open 'T' $991
EFO3624979A936"Open 'T' $991
EFT4224767A742"Closed 'T' $998
EFT2424868A824"Closed 'T' $1 007
EFO4224868A842"Open 'T' $1 007
EFT3024868A830"Closed 'T' $1 009
EFT3624868A836"Closed 'T' $1 009
EFT4824656A648"Closed 'T' $1 041
EFO4824767A748"Open 'T' $1 092
EFO4224979A942"Open 'T' $1 111
EFT2424979A924"Closed 'T' $1 112
EFT3024979A930"Closed 'T' $1 114
EFT3624979A936"Closed 'T' $1 114
EFT4224868A842"Closed 'T' $1 116
EFT4824767A748"Closed 'T' $1 190
EFO4824868A848"Open 'T' $1 226
EFT4224979A942"Closed 'T' $1 233
EFT4824868A848"Closed 'T' $1 335
EFO4824979A948"Open 'T' $1 357
EFT4824979A948"Closed 'T' $1 479
EFO2430433ALegal30"324"Open 'T' $464
EFO3030433A330"Open 'T' $466
EFO3630433A336"Open 'T' $466
EFO4230433A342"Open 'T' $518
EFT2430433A324"Closed 'T' $558
EFT3030433A330"Closed 'T' $560
EFT3630433A336"Closed 'T' $560
EFO4830433A348"Open 'T' $568
EFT4230433A342"Closed 'T' $612
EFT4830433A348"Closed 'T' $662
EFO2430656A624"Open 'T' $770
EFO3030656A630"Open 'T' $772
EFO3630656A636"Open 'T' $772
EFT3630656A636"Closed 'T' $828
EFO4230656A642"Open 'T' $869
EFT2430656A624"Closed 'T' $880
EFT3030656A630"Closed 'T' $882
EFO2430767A724"Open 'T' $883
EFO3030767A730"Open 'T' $885
EFO3630767A736"Open 'T' $885
EFO4830656A648"Open 'T' $952
EFO2430868A824"Open 'T' $977
EFO3030868A830"Open 'T' $979
EFO3630868A836"Open 'T' $979
EFT4230656A642"Closed 'T' $980
EFO4230767A742"Open 'T' $997
EFT2430767A724"Closed 'T' $1 007
EFT3030767A730"Closed 'T' $1 009
EFT3630767A736"Closed 'T' $1 009
EFT4830656A648"Closed 'T' $1 062
EFO2430979A924"Open 'T' $1 076
EFO3030979A930"Open 'T' $1 078
EFO3630979A936"Open 'T' $1 078
EFO4830767A748"Open 'T' $1 093
EFO4230868A842"Open 'T' $1 106
EFT2430868A824"Closed 'T' $1 119
EFT4230767A742"Closed 'T' $1 121
EFT3030868A830"Closed 'T' $1 121
EFT3630868A836"Closed 'T' $1 121
EFO4830868A848"Open 'T' $1 215
EFT4830767A748"Closed 'T' $1 217
EFO4230979A942"Open 'T' $1 220
EFT2430979A924"Closed 'T' $1 232
EFT3030979A930"Closed 'T' $1 234
EFT3630979A936"Closed 'T' $1 234
EFT4230868A842"Closed 'T' $1 248
EFO4830979A948"Open 'T' $1 343
EFT4830868A848"Closed 'T' $1 357
EFT4230979A942"Closed 'T' $1 376
EFT4830979A948"Closed 'T' $1 499

The Mayline Adder sections are available in a great variety of configurations allowing to customize unit dimensions, number of shelves and uprights style. See below to view all the customizable options:Customize Your 4-Post Filing Double Entry - Adder Unit

Media Type
There are two depth options to choose from, corresponding to two media types: Letter or Legal.

  • Letter Size - 24" Depth
  • Legal Size - 30" Depth

Number of Openings
This 4-Post Filing Adder Unit is available in five variations that differ by number of tiers that correspond to the number of usable shelves.

  • 3 Tiers
  • 6 Tiers
  • 7 Tiers
  • 8 Tiers
  • 9 Tiers

Unit Width
A great choice of width options promotes flexibility in how much you would like to expand you filling system.

  • 24"
  • 30"
  • 36"
  • 42"
  • 48"

Choose between closed or open "T" type uprights to best suit your needs.

  • Open "T" Upright
  • Closed "T" Upright

Optional Paint Colors
Mayline 4-Post Filing System comes in 17 finish colors at your choice.
*Please write your color preference in your order special notes.

To purchase this product, please select from the drop down menu above