... ROHS. 2. Materials: NBR, NR, FPM...etc 3. Use for all machines,size:50-630 O RING MATERIAL SR:good resilience,ozone ... Shore A3. Quality certificate: TS16949 High and low temperature resistance,UV-resistance ,Ozone resistance,Abrasion resistance Color: Black,white, Transparent,gray ... , Armarium,Toy etc10.Lead time of goods:1-2weeks for 10000pcs.11.Package:Standard export packing:PVC bag,Carton,Pallet12 ...