Features: Premium Material: This crank hat is made of aluminum alloy material, strength, corrosion resistant, sturdy and durable. With anti rust, colorfast, lightweight and durable. Distribute the Pressure: This crank hat can distribute the pressure of the nut over the part being secured, reducing the chance of damage to the part. The fine design with precise machining, fits crank perfectly and offers professional fixation of crank. Great Decoration: Mountain bike crank with different color for you to chose, meet different needs. The bright color makes it be a great decoration for your bikes. Easy to Install: This bike crank s is lightweight, easy to install and use.Fits most mountain bikes with hollow shaft. Range: Wonderful accessory for bike chainwheel. It is used to fix the the crankset and crank of the chain wheel, which is a great accessory for cycling enthusiasts. Specifications: Name: One-piece hollow crank cover screw Material: Aluminum alloy Net Weight: About 8g Color: Black, red, blue, gold, colorful Features: -strength aluminum alloy material, CNC turning, surface anodizing, fine workmanship, laser laser, complete specifications, multi-color optional Model: M18(1.8*1.2*2.8cm), M19(1.9*1.2*2.8cm), M20(2*1.2*2.8cm) Notes: 1. Due to the effects of light and shooting angle, the actual color of the item may slightly differ from the color shown on the picture. Include: 1 * Handle cover screw