The CRL Tube Container System works with common 6" (152 mm) Schedule 40 PVC pipe to create an efficient and protective storage system for any long stock lengths of product or tools, such as straight edges and levels. Cat. No. 658TE includes one weather-tight Door Cap which you can close and lock as well as a Permanent End Cap. The Cat. No. 658SU includes two U-Bolts with Saddle Brackets to firmly mount your storage tube on your vehicle. There is no limit as to the length since you provide and cut your pipe to any size you want.