The 35mm bending and back former works with the REMS Curvo 50 benders on hard, half-hard, soft copper tubes (also thin-walled), on stainless steel pipes of pressfitting systems EN 10312, series 2, EN 10088, EN 10217-7, and on soft precision steel tubes EN 10305-1, EN 10305-2, EN 10305-3, carbon steel pipes EN 10305-3. The REMS Adapter Support 35mm-50mm is needed for the Curvo 50.