Item:Aluminum Rear Shock Absorber 101mmDiameter of Hollow Ball Hole:3mmLenght of Hollow Ball:8mmPackage: 2 Pieces (Come with 2pcs Steel Hollow Balls M3*5mm，As shown in the figure) ? Easy To Install? CNC machined pistons and shock bodies for a precise fit? Polyoxymethylene - (POM/thermoplastic) shock pistons offers smooth action? Clear anodized shock bodies? Single coil springs? Includes steel ball studs? All hardware for assembly included? Two shocks per package