Weightnet weight 1.225KG, including packaging about 1.5KG SizeThe shelf surface length 55CM, width 14.5CM, support feet can be adjusted about the height of 35-45CM. AdvantagesQuick release, lightweight, with reflective sheet tail light, with side wings (guardrail), with elastic rope, adjustable front and rear position of the shelf, adjustable height of the support feet MaterialAluminum alloy Suitable for models24inch-29inch bicycle with a diameter of 33MM or less. Accessories6 screws, 6 nuts, 6 fillers, 4 small spacers, 4 large spacers. Because it is a non-slip nut, the internal rubber ring, so there will be screwed half of the phenomenon can not be turned, but as long as the hard turn, poke through the rubber ring can be, this screw as long as the installation is not easy to slip out, very safe. Material: Aluminum,Aluminum Alloy About this item: Loads up to 110lb ,Durable aluminum alloy bike carrier rack,Perfect for a Long Cycling Trip and Excursions to Carrying Enough Daily Necessities ,perfect for use with panniers, backpacks, baskets, and more! Hollow aluminum construction is tough yet lightweight, and red/taillight mounts offer safety-minded touches.Addition Prop Fixed to Rear Frame and 2 Side Bars for Preventing Scratched by The Wheel or Spokes.it features a top plate that acts as a rear fender and splashguard. Aluminum alloy material , Suitable for most bicycles, Such as road bike, mountain bike, fat bike, etc Come with tools and installation instruction, Easy to install.