Made from a single sheet of lightweight 5052 alloy The Sparrow`s wings fold in to securely cradle your water bottle and the cut outs help keep the cage light Holds stainless steel bottles and standard bottles securely Includes stainless steel bolts for installation Get a Sparrow and make your ride fly 52g Standard Alloy Copper Braze-onUPC/EAN/GTIN: 812938015298