Scubapro SMB 3.5 ft (1.1 m) 210D NylonThis compact SMB (surface marker buoy) folds into a small package for easy stowing while diving, then deploys quickly once you reach the surface. Made of rugged 210D nylon with HF welded seams, the bottom is sealed and a metal inflator and 42mm exhaust valve are included. Theres a 25mm stainless D ring and bungee loop on the lower end, with a plastic D ring on top for a flashlight. Available in orange and yellow Dimensions: 42in 104cm x 6in 16cm.