Perma-Cote, Conduit Elbow, Standard Radius, Metric Size Designator: 21, Pipe Size: 3/4 IN, Diameter: 1.130 IN External Diameter X 0.836 IN Internal Diameter, Tangent: 2.750 IN, Nipple Length: 12-1/2 IN, Radius At Inside Of Bend: 3.940 IN, Radius At Outside Of Bend: 570 IN, Radius At Center Line Of Bend: 4.500 IN, Offset At Inside Of Bend: 6.685 IN, Offset At Outside Of Bend: 7.815 IN, Degree Of Bend: 90 DEG, Offset At Center Of Bend: 7.250 IN, Thread Protector Cap Color: Red, Material: Steel Body, Plastic Thread Protector Cap, Finish: 40 MIL Gray PVC Exterior Coating, 2 MIL Green Urethane Interior And Thread Coating