Designed to fit underneath your boat seats or on the floor, the Telescope Locker/Seat Tube Sac features a durable 60-gauge PVC construction. Sonic welded seams and fill drain ports ensure it withstands long-lasting use. The Telecope locker/seat sac includes one 1-1/2" diameter fill port and three 1" diameter drain/vent ports. Bag must be filled using Eight.3 ballast pumps from Ronix. 45"L x 17"W x 8"H.