Cylinder Storage / Transport Cradle. Suitable for all size cylinders in the vehicle, and all cylinder sizes on the shelf. 2 Heavy duty webbing straps with heavy duty closed cell poly foam support bars. Double strap system prevents the larger cylinders from twisting and rolling about during transport. Velcro back grips vehicle carpet for added hold down security during transport. Fully adjustable velcro backed straps fit all cylinders from 3 to 15 litre.