Special features: 1. Shapes: coupler, elbow 90¡ã, elbow 45¡ã, equal tee, end cap, cross piece, crooked pipe, bipass bend, etc. 2. Temperature: -40~+95 degree centigrade 3. Colors: green, white, gray, or any color by request. 4. Dimensions: 20~160mm 5. OEM with customers brand name available 6. Service life can last up to 50 years. Standard package or as per customer's requirement.