Standard Tubing Bender - bends up to 180 Degree & fits 3/16", 1/4", 5/16", and 3/8" Tubing. Standard Tubing Bender - bends up to 180 Degree & fits 3/16", 1/4", 5/16", and 3/8" Tubing. Works with Steel, Copper, and Copper/Nickel Tubing, Black Powder Coated. Not Recommended for Stainless Steel Tubing