Replacement cast steel end cap washer for most disc harrows with 1" square axles. This end cap is used on the outer side of the disc axle, use the bumper washer (listed in my store) towards the center of the disc harrow where the axles come close together. Listing is for one cast steel end cap washer for 1" axle that is 3" diameter. Listing is for one (1) end cap!