Generalaire 4551 Furnace Filter 20x25x5 MERV 11 for MAC 2000. Replaces Part # 4501 MERV 10. Actual Size 19 5/8" x 24 3/16" x 4 15/16." Case of 3 2500HV Specifications printed on Solenoid Body:

Specifications printed on Solenoid Body: 120 volts

Actual Size 20 3/4" x 19 3/4" x 4 15/16"

Also Replaces X6667 Filter (HCFPCO20-11)

Actual Filter Size is 15 3/4" x 24 3/4"x 4 3/8"

Generalaire 4551 Furnace Filter 20x25x5 MERV 11 for MAC 2000. Replaces Part # 4501 MERV 10. Actual Size 19 5/8" x 24 3/16" x 4 15/16." Case of 3 2500HV Specifications printed on Solenoid Body:New MERV 11, Part # GF 4551, 20x25x5 Replacement Filter for Generalaire GF 4501 MERV 10 Actual Dimensions: 19 5 8" x 24 3 16" x 4 15 16" (with foam strips) Fits Generalaire MAC 2000, Trion Air Bear Supreme 2000, Skuttle DB0 0025 020, & Ultravation 90 007 MERV 11 Rated Package of 3