Gibraltar straight extension tubes have a 1 1/2" diameter and feature plastic end caps. Build your own Gibraltar rack system to your own exacting specifications. Available in 5 Lengths SC-GPR24C - 24" (61cm) SC-GPR30C - 30" (76cm) SC-GPR36C - 36" (91.5cm) SC-GPR40C - 40" (102cm) SC-GPR46C - 46" (117cm) Custom lengths can be created using the Gibraltar SC-PCUT Pipe Cutter
