Material: Silicone Rubber Diameter: 15mm 20mm 25mm 28mm 30mm 35mm 40mm 45mm 50mm Silicone rubber is a soft and elastic material high temperature resistance, anti-aging, acid and alkali corrosion resistance, Tasteless, non-toxic, high transparency, long life, Long-term use does not harden, do not change color and so on. Please contact me before you return it. Not accept returning of electronic components.Feedback is very important to us. This item is in the category "Home & Garden\Other Home & Garden". The seller is "electricshop60" and is located in this country: CN. This item can be shipped worldwide.