ALLOY SHOCK SET BORE:11mm, LENGTH:115mm PISTON:2x1.3mm OIL:500cstThis Shock Set provides a pair of assembled aluminum body shock absorbers filled with high quality silicone shock oil for a fast and efficient shock upgrade for your vehicle Includes 2 x Assembled Shock Absorbers 2 x 3mm Preload Spacer 2 x 5mm Preload Spacer 2 x 7mm Preload Spacer Requires Springs such as #AR330539 or #AR330460 Features High quality anodized aluminum shock bodies Tough molded shock caps, shock seal cartrigdes and preload adjusters