SICURO Titanium Bottle Cages are handmade by our engineers at SILCA headquarters in Indianapolis, IN USA using aerospace grade Titanium and state of the art laser welding techniques. We also gave them elongated mounting eyelets so you have 10mm of fore/aft adjustment to suit your different bikes. We're so confident that we've created the ultimate bottle cage that your purchase comes with our 25-year Shield level warranty; the most comprehensive warranty in the bicycling industry.