1.LSB specially produce the o-ring,x-ring.rubber parts 2. Material: FFKM,NBR, HNBR,EPDM,SI,FKM(VITON)CR, ... :cars,Bath,Gate,Hydropneumatic,Electronics,Powertools,Fire ,extinguishers ,Refrigeration Compressor in air conditioning, etc.3. Main products: O-Ring.X-Ring ... can be make on your requirement ,but o-ring's mold fee is free. industrial rubber oil ring