1. LSB specially produce the o-ring,x-ring.rubber parts 2. Material: FFKM,NBR, HNBR,EPDM,SI, ... conditioning, etc.3. Main products: O-Ring.X-Ring V-Ring.R-Ring. Y-Ring.U-Ring., Oil Seal,PU oil seals ... Test, Thickness Meter, Shore-A Hardness Tester, Optical Projector rubber y shape ring