... silicone o ring 2,medical grade silicone 3,OEM is welcome 4,design mould for you 5,good price. soft ... /cuffthe material:rubber, silicone,the hardness acording to your requestthe size:according to your sample,drawing and design,depend on your ... possible, ranging from aircraft seating to cars to motorcycle helmets. OEM is welcome molded food grade 100% pure custom made silicone/soft silicone o ring