Part # 3426 – 10 x 20¼ x 2 (Notched)

  • Cellulose Base
  • Impregnated with Plastic Resins & Anti-Rot Agents
  • Durable & Easy to Install
  • Energy Efficient
  • Engineered for Optimal Performance & Longevity
  • High Air Velocity
  • Limited One-Year Warranty
Part # 3426 Category:
Part # 3426 Mobile MasterCool® MMB10 (Notched)
Part # 3427 Mobile MasterCool® MMB12 (Notched)
Part # 3428 Mobile MasterCool® MMB14 (Notched)


Part # 3426 Dimensions (W x H x D)

10" x 20 1/4" x 2"

Part # 3427 Dimensions (W x H x D)

15" x 24 5/8" x 3"

Part # 3428 Dimensions (W x H x D)

20 1/8" x 28 3/8" x 3

California Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer and birth defects and other reproductive harm.

Proposition 65 is a California law requiring manufacturers to provide notice to consumers for products that contain chemicals known to the State of California to cause cancer or birth defects or other reproductive harm. Currently the number of chemicals listed under California Proposition 65 is more than 900, with many new chemicals being added every year. Dial Manufacturing, Inc. believes that its products are safe when used as intended. However, to be compliant with this law, Dial is providing the above warning on products linked to this page.

The current list of Prop 65 chemicals can be found here: