1.Soft silicone set 2.Different color and size 3.Flat rubber gaskets quick supply 4.waterproof,dustproof 5.Meterial:silicon flat bottle capsThe bellowing is the detailed in formation of this product:1. Materials: NBR, HNBR ,SBR ,FPM ,CR , NR ,etc, just as your request.2. Temperature ranqe: -100-300 celsius degrees3. Hardness: between 30-80 shore A4. Color: black, transparent, green, red, yellow, ...