Imperial o-ring kit/set high quality 447pcs,383pcs,444pcs,435pcs assortment etc mold plastic box packing with each size Imperial o-ring set / universal series o-ring assortment for each machine model Sizes: 383pcs, 386pcs,444pcs,447pcs, 435pcs, 419pcs etc high temperature resistant,acidand ,alkali proof,oil proof,chemicals etching resistance Material : NBR,VMQ , FKM ,HNBR ,etc Package: plastic ...