This bike carrier rack is made from aluminum alloy and rubber sucker. It is easy to install and carry your bike on the car roof top.Features:Made from aluminum alloy, sturdy enough to hold your bike.Rubber sucker protect your car paint from scratches.Fixing straps help keep the bike crank and rear wheel in place.Easy to install and take off, can be used on most vehicles like sedans, coupes, SUVs, vans, etc.Fits road bikes, mountain bikes, or any bike with quick release front fork.Note: 1. Please keep your driving speed below 120km/h.2. Check the sucker every 4 hours to prevent air leakage.Specifications:Material: Aluminum alloy + RubberColor: Black / Red (optional)Type: For 1 bike / For 2 bikes (optional)For 1 bike:Total Length: Approx. 47cm / 18.5inPackage Size: 49 * 21 * 17cm / 19.3 * 8.3 * 6.7inPackage Weight: 2.1kg / 4.6lbFor 2 bikes:Total Length: Approx. 82cm / 32.3inPackage Size: 84 * 21 * 17cm / 33.1 * 8.3 * 6.7inPackage Weight: 3.4kg / 7.5lbPackage List: (For 1 Bike)1 * Bike Rack1 * Suction Cup1 * Fastener Strap