Filtrete 9823-4 Air Filter, 24 in L, 14 in W, 11 MERV, 1000 MPR, Polypropylene Frame, Pack of 4 Putty Knives The replacement dies are for

The replacement dies are for use in die head models OO-R

It spreads smoothly into cracks and holes

'Diamond Shank' fits ideally into a square hole of Dura Soft handle

it allows Keeper tow straps to resist breakage and remain dependable under the most demanding conditions

Filtrete 9823-4 Air Filter, 24 in L, 14 in W, 11 MERV, 1000 MPR, Polypropylene Frame, Pack of 4 Putty Knives The replacement dies are forOpt for a Filtrete allergen defense air filter to transform your central heating and cooling system into a whole home air filtration operation. This no nonsense filter helps capture varying sizes of particles, from the large (lint, pollen, dust and pet dander) to the microscopic (smoke and smog). Unit: EA UPC: 051111098233 Model Number: 9823 4