【CUSTOM】- Custom made bands that will work with most spearguns in the market like AB Biller, JBL, Ocean Rhino, Sea Hornet, etc.. Hand made in the USA 【QUALITY】- The rubber is Manufactured by Primeline, which is the world’s leading manufacturer of speargun rubber in the world. The unique latex formulation and dip manufacturing process delivers radical modulus strength. Special anti-oxidants help protect against harmful U.V. rays, prolonging sling life. 【STRONG】- The power curve increases as bands are stretched for optimum performance. Wishbones are made of 302 stainless steel wire to provide superior strength and holding power onto the notches of the speargun spear shaft 9/16 inch (14mm) O.D. Natural Rubber. The unique latex formulation and dip manufacturing process of the rubber delivers radical modulus strength. The power curve increases as bands are stretched for optimum performance. Special anti-oxidants help protect against harmful U.V. rays, prolonging sling life. Wishbones are made of 302 stainless wire and provide superior strength and durability. They are also a great option for divers looking to refresh old bands on their speargun.