... .Standard:JIS,UNI,DIN,ASTM,GB 4.Samples free Seal Washer :1. Material: NBR, SILICONE, VITON,HNBR, CR, PTFE, ... 126, 436, 440, 7349, 7989, 9021),BA,NFE,JIS,and according to customers' requirements.3.Material:Carbon steel,45#,65Mn ... machinery,construction,transportation,electric power,electronics,chenicals,home appliances,militaryinductry and other 9.Packing: Boxes-->cartons-->pallets;Cartons-->pallets; ...