seal kits for JCB

*Regarding O-rings, most important is the hardness.for the moment, there are two different materials NBR70°to90° or FPM75to 95. NBR materials have good performance on high pressure is more suitable for excavator and FPM materials have good performance on high temperature it good for hydraulic breaker. but we supply is NBR90°,it no smell and have good performance. *Regarding Backing seals,there are two different type. non-copper powder and contained copper powder. Contained