The Empire HPA FT Tank Cover in Blue color is a hex pattern Neoprene 'bottle glove' meant to protect your precious air tank. Cool hex pattern with raised neoprene pattern that's pretty rad. It's meant to fit on 68-72 ci air tanks. They also fit perfectly on the Ninja 77/4500 CF SuperLite tanks. They also fit on the Ninja 48/3000 tanks, but slightly loose. They do not fit on the Ninja 62/3000 or the 90/4500 tanks.Protect your expensive HPA tank investment from scratches, drops, and mishandling with an extra layer of protection. A neoprene cover is a must-have for HPA users.