Taking a standard 10″ Clamp and adding Schedule 40 Aluminum Pipe fittings makes this clamp one of the most versatile. Clamp adjusts from 10″ to 20″. Riding on standard Schedule 40 Aluminum Pipe 1-1/4″ this multi-Purpose clamp can make any rigging challenge easier. Matthews C Clamps are manufactured from premium drop forged steel. It should b e noted however, that since the Matthews clamp is an adaptation of a standard C Clamp, there is no effective warranty on the part. Black only. Shown here with Schedule 40 Aluminum Pipe 1-1/4″, not included.