Made of nitrile butadiene rubber (nbr) it withstands heat up to 226 f.The strike industries bang band mini gives you the ability to add additional grip to a pistol grip magazine or any small sized object.The grooves and anti-slip texture gives you better handling and feeling of your weapon.The positive tactical feeling enhances your pistol grip and/or magazine with an additional gripping surface for your dominant and/or support hand.The 34mm (1.34) diameter by 14.7mm (0.58) wide strike bang band mini is strong and durable for you to also use in other applications when a standard rubber band just is not enough.Try it on a scope magnification adjustment ring within the bang band mini size range as an enhanced and slim scope accessory.Material: Rubber