O-ring(rubber o-ring,silicone o-ring,nbr o-ring) 1)durable,collapsible,pressurization 2)high quality, reasonabl DetailsWe ... every client's requirement.1.MerchandiseO-ring(rubber o-ring,silicone o-ring,nbr o-ring)2. MATERIALasbestos fibre, rubber and heat-resisting ...