Tube Bender Bend Mechanism Style Lever Bend Type Markings Calibrated Angle Markings from 0 to 90 Degrees Tubing Outside Diameter 1/4 in 5/16 in 3/8 in Compatible Tubing Material Copper Bend Angle - Minimum 90 Degrees Bend Angle - Maximum 180 Degrees Centerline Bend Radius 0.95 in 0.98 in 1.01 in Application HVAC Plumbing Tube Bending