584210 Heater Filter 21" x 9-1/4" $21.42 Quantity discounts available QuantityPrice Quantity -+ Add to Cart Details SPECIFICATIONS:Length: 21" (533.4mm)Width: 1/4" (6.4mm)Height: 9 1/4" (235mm)General Specifications: Details Back DetailsSPECIFICATIONS:Length:21" (533.4mm)Width:1/4" (6.4mm)Height:9 1/4" (235mm)General Specifications:Aluminum frame; expanded aluminum pad