Advantages white transparent import import O-ring O-ring silicone material: 1, after modulation formula tensile strength up to 500PSI and anti-Sri Lankan resistance up to 88LBS. 2, a good and a good compression deformation. 3, of a neutral solvent having a good resistance. 4, with excellent heat resistance. 5, with excellent cold resistance. 6, for ozone and oxides with excellent corrosion resistance. O-ring seals and other types of comparison, has the following advantages: 1, for a variety of seal forms: static seals, dynamic seals for a variety of uses materials, dimensions and grooves are standardized, interchangeable 2 for more kinds of movement: the rotational motion, or a combination of axial reciprocating motion (such as a combination of rotary reciprocating motion) 3, for a variety of different sealing medium: oil, water, gas, chemical, mixed media or other media through the appropriate choice of rubber material and appropriate formulation design, realization of oil, water, air, gas, and various chemical mediators effective sealing effect. Wide temperature range (- 60 ℃ ~ + 220 ℃), fixed using a pressure of up to 1500Kg / cm2 (with reinforcement ring and use). 4, the design is simple, compact, easy assembly and disassembly O-ring cross section structure is extremely simple, and there is self-sealing, reliable sealing performance. Because O-ring structure itself and the installation site is extremely simple, and has become standardized, so are very easy to install replacement. 5, material variety, can be selected according to the different fluids: rubber (NBR), Viton (FKM), silicone rubber (VMQ), ethylene-propylene rubber (EPDM), chloroprene rubber (CR), butyl rubber ( BU), polytetrafluoroethylene (PTFE), natural rubber (NR) and the like.