Features: All seal heads are made from 6061-T6 aluminum to save weight Air bleed hole helps remove air from the oil reservoir during seal head installation Oil seal utilizes a double lip design and a low friction elastomer. This gives the seal head additional dirt exclusion and yet maintains a low drag (low friction) seal The dust seal utilizes a spring type exclusion seal to maintain constant pressure and assure good dirt and contaminant exclusion over the life of the seal head Kit Contents Description QTY per Kit Aluminum Head Only 18x46 1 O&';Ring 1 Rear shock Dust Seal, 18-28-7.3/10 1 Rear Shock Oil Seal, 18x28x6 1 Rear Shock Spacer 1 Seal 1 Split Bushing 1