22 Series NCM Construction: Single Acting, Spring Extend No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Description Material Aluminum alloy Aluminum alloy Stainless steel Aluminum alloy Stainless steel Carbon steel Sintered Bronze Spring steel Urethane Spring steel NBR NBR NBR Music wire Aluminum alloy Note Clear anodized Clear anodized Stainless steel 304 Chromated Hard chrome plated Chromated Chromated Rod cover Head cover Cylinder tube Piston Piston rod 3/4", 7/8" 1-1/16", 1-1/4", 1-1/2" Bushing Retaining ring Bumper Retaining ring Piston seal Piston gasket Rod seal Spring Spring guide Component Parts With bumper