900-5, 800-5 Series Adjustable Type Parallel Tube Expander with 5 Rolls for Thin Wall Tubes Suitable for 1.1/2'' OD X 17 BWG (1.47mm), 18 BWG (1.24mm), 19 BWG (1.06mm), 20 BWG (0.89mm), 21 BWG (0.81mm), 22 BWG (0.71mm), 23 BWG (0.64mm), 24 BWG (0.56mm) Thick Tubes.