Description: Scuba tank boot for 6L aluminum air cylinders Protect the bottom of your scuba tanks/cylinders from dings, nicks and dents Corrosion resistant and durable Size: approx. 5.35" x 3.43" /13.6 x 8.7 cm (inside diameter x height) Material: Rubber Color: Black Package Includes: 1 Piece Scuba Tank Boot Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!