General description Copper sealing washers are essential components for creating leak-proof seals in various applications. This pack contains 100 pieces of M16 copper sealing washers, designed to provide reliable sealing performance in plumbing, automotive, and other mechanical applications. Technical specifications Inner Diameter (ID): 16mm Outer Diameter (OD): 20mm Thickness: 1.5mm Standard: DIN 7603A Quantity: 100 pieces