China Manufacturer Quality Rubber O Ring For Thermos Our services: 1.Reasonable Price 2.Good quality 3.Short delivery time 4.Best after-sales service 5.OEM service available Products Features O Ring Materials : Rubber, NBR , H-NBR ,VITON , SILICONE ,ETC, Work pressure: 0-100Mpa Operation temperature: -50℃-260℃ Product Sizes Customized according to your need,at the same time,we can make perfectly as the drawing or samples. Product Shape Dealing with them completely smooth,and welcome to give us your special demands.