... Products Quality: Each product is tested before packing, quality guaranteed; Applications: for soft copper, aluminum, soft steel tubes expanding2. About factory Experience ... .Easy to operate, safe and depandable.Quality guaranteed. CT-100A(for inch): 3/8", 1/2", 5/8", 3/4", 7 ... /8", 1", 1-1/8" O.D. Tubing.CT-100M(for metric): 10, 12, 16, 19, 22, 25, 28mm O.D ...