【Material】The cup holder is made of aluminum and genuine leather. but attention please, because in the outdoors will be exposed to the wind and sun, so leather painted with protective paint, some places will look wrinkled.【Easy to Install】Fits for most handlebar with diameter of 0.87 (22.2mm)~1 (25.4mm). And each bike has a different shape, and maby some may be oval, So please note that if you tighten the cup holder and it still slides, wrap several rolls of electrical tape or non-slip sheet.【Applicability】Fit for use tapered cups ( wider at top than bottom). Accommodates Handleless 12-16-20 oz Coffee cups . Handle the different cup sizes cups with sealed lids. If you want to use disposable cups or standard water bottle, Please check the dimensional drawing.【Vintage Classic Design】The retro shape enriches your pleasure of riding. Carries a range of handle less cups, like your morning coffee, tea or hot chocolate cup, Cup Holder securely holds your drink on your handlebars so your hands are free to ride your bike.