... 5.Standard size You know we are a manufacturer, so the OEM/ODM are acceptable, also the LOGO and special design/pattern can ... the automobile hub cover, air sealing and steering bushing with various sizes and colors, its material spec can be CR,FPM,nature rubber ... hardness Can be ±5 shore A, for some special products, can reach ±3 shore AColor For rubber, usually black, for silicone, can ...