Cyl-Tec Aluminum 80 Scuba Tank BrushedThe Aluminum 80 cu ft  Scuba Tank is the most popular Tank of the diving industry. The tank is a 3000 psi (207 bars) service pressure tank measuring 26.1" (66.3 cm) tall with a 7..25" (18.42 cm) diameter. The cylinder weighs 31.4 (14.2 kg) is negative 1.9 lbs. when full in salt water and is positively buoy..