Product Details: Brand: ROCKBROS Material: Bracket and cover plate made of aluminum alloy + rubber suction cup + nylon strap Weight: Approximately 2.5kg (net weight of the product) Mounting Positions: Roof or rear Package Includes: Safety suction cup * 1, Handlebar clamp suction cup * 2, Pad suction cup * 1, Towel * 1, Crank cable tie * 1 Features: Firm Adsorption The ROCKBROS bicycle roof rack has a strong suction cup that can be firmly adsorbed on the roof. It has strong adsorption power, no glare, no scratches, high durability, and is not easy to dislodge. Vacuum Suction Cups The ROCKBROS bicycle roof rack uses a vacuum pumping device. Gently press the piston rod until the white part is no longer exposed. It is easy to operate. Multiple Installation Methods This roof rack can be installed on the roof or at the rear of cars, SUVs, sedans, MPVs, vans, and other models. However, the installation surface must be flat and smooth, not concave or convex. Note: It cannot be installed on the rear of a motorcycle. Nylon Straps and Crank Straps This roof rack is equipped with extended nylon straps that securely bind the frame to prevent wobbling and lock your bicycle in place. Velcro fasteners secure the crank position and prevent damage to the roof. Storage Bag Comes with a ROCKBROS storage bag made of Oxford fabric material. It can be carried by hand, is easy to carry, wear - resistant, and durable. It has an in - built mesh pocket that can neatly organize items.