Features: Put over a bolt or a screw to give a softer or larger pressing surface, or put between two pipes to make a better joint. Absorbs vibrations, corrosion resistance, protection against electrolytic action and protection of the surface of materials to be assembled. Material: PE(Nylon) Hard or Soft Material: Soft Thickness: 0.8mm-2mm Work Temperature: -20℃-120℃ Fire-protection Rating: 94V-2 Usage: For Threaded Screws and Bolts Advantage: Strong insulation,light-weight ,wear-resisting corrosion resistance,high temperature resistance Eg: M3-8 T1 Inner diameter is 3mm, Out diameter is 8mm, thickness is 1 mm 1inch=25.4mm Size for choose: M3(inner diameter)*8(out diameter)*1.0(thickness), M3*13*0.9, M3.5*11*1, M4*8.5*1, M4*13*1, M4*17*1, M5*7.5*1, M5*10*1, M5*14*0.8, M5*18*0.9, M5.8*14*0.8, M6*11*0.8, M6*13*1, M6*18*0.9, M8*11*2, M8*13*0.8, M8*16*0.9, M10*13*1, M10*16*1, M12*20*1, M14*22*1.2, M16*28*1, M18*27*1, M20*30*1 　 Note: Lighting, display and other factors may cause COLOR SHADING, please comprehensive pictures and text descriptions to determine! Package Includes 200pcs soft nylon flat washers