Material: Plastic( Screw is metal)Color: BlackMEasy to apply and removeCan be used with Backhoes holderInstall video light， monitors，camera，DV and other accessoriesCan Mount your camera on motorcycle/bike/bicycleCompatible with: GOPRO hero3， 2， 1/ SUPTig/ Sports DV/ Digital ProductsSize ReferneceMinimum opening diameter: 0.39inch/1 cmMaximum opening diameter: 1.59inch/4 cmPlease Note:Due to hand measure， the size may have 1-4 cm errorDue to Different Monitor， the color may have differenceDue to long shipping， the item may damage in transit， if the item damage， pls contact us firstly immediately before leave feedback， thanks for your understandingPackage Included:1 x Tripod Bicycle Bike Handlebar Camera Bracket