Flat washer,puck: 1 Material:aluminum; 2 CNC lathing parts; 3 Different sizes are available. Flat washer,puck:1 Material:aluminum;2 CNC lathing parts;3 Different sizes are available.4 Advanced workmanship and equipment;5 Strictly controlled quality;6 Different sizes are available.We keep on taking effort to improve ourselves for better service to you. Flat washer,puck