Tube Bender Bend Type Markings Left Offset Right Tubing Outside Diameter 3/16 in 1/4 in 5/16 in 3/8 in Compatible Tubing Material Aluminum Copper Steel Bend Angle - Minimum 0 Degrees Bend Angle - Maximum 90 Degrees Centerline Bend Radius 15/16 in 5/16 in Application Tube Bending Features 90 Degrees Start Requires Less Effort - Making Bending Fast and Easy Overall Length 8 1/4 in