Mini Tube Cutter CT-126 For 1/8" to 5/8" O.D. zinc alloy body, zinc plated finish. CT-126 Mini Tube Cutter For 1/8" to 5/8" O.D. zinc alloy body, zinc plated finish. For hard or soft copper,aluminum,brass,thin wall steel,stainless steel,titanium and other tubing. We supply all kinds of refrigeration tools.