1.OEM size 2.100% pure silicone rubber 3.high quality Specifications 1. 100% silicone material,Eco-friendly2. Durable, soft, flexible3. Heat resistant, waterproof4 ... own 4 sets 250T forming and vulcanizing machine .Features:1. 100% silicone material, non-toxic, Eco-friendly2. Temperature range -40 to ...