1 Material:aluminium 2 Colour:silver,white,or design as yours. 3 Weight:different is available 1 Material:aluminium 2 Colour:silver,white,or design as yours. 3 Weight:different weight is available. 1,Body:Adopts quality aluminum alloy one-time extrusion forming,with dense material and high strength,with surface spray coating treatment,with delicate lock.2,Piston:The material is 45#stell,with ...