I have a 1" aircraft quality braided stainless steel fuel line filled with lead shot. It's about 2 feet long, has anodized billet aluminum cap ends and the thing is rated at 4500psi. It weighs about 10 pounds. It's flexibility makes it very easy to conceal. So far it stays at home, but it could easily slip into some oversized belt loops or over my shoulder in a jacket without being noticeable.