dear sir our factory specificalzie in all kinds of o rings,o ring kits,hardware kits,cooper ring kits,rubber parts,plastic parts,metal parts,springs so on; All kinds of specification and shapes, your requests are available Good quality, reasonable price,promote delivery Your sample, drawings or idea are welcome Fulfilling different kinds and quantities of orders to provide products from NR,SBR, NBR, EPDM, CR,Silicone, FI,Nylon,Plastic ,stainless,steel,copper,braze,and so on; please sent your email to our factory emails address: so as to our factory shall quote and sent samples to you; Mr Eric chou