pieces 18mm aluminum alloy bicycle axle shaft screw nut accessory cycling crank cover (black).

1. Made of aluminum alloy, high strength, corrosion resistant, sturdy and durable. 2. Lightweight, easy to install and use. 3. Distributes the pressure of the nut across the part being fastened, reducing the risk of damage. 4. Available in 3 different colors to suit various needs. 5. A wonderful accessory for bicycle chainrings.

Specification:

Features: 1. Made of aluminum alloy, high strength, corrosion resistant, sturdy and durable. 2. Lightweight, easy to install and use. 3. Distributes the pressure of the nut across the part being fastened, reducing the risk of damage. 4. Available in 3 different colors to suit various needs. 5. A wonderful accessory for bicycle chainrings. Specifications: Item Type: Axle Screw Nut. Material: Aluminum Alloy. Weight: Approx. 25g. Optional Color: Red, Black, Gold. Diameter: Approx. 18mm/0.7 inch Type: 18mm Scope of application: integrated chainring Notes: Applicable to integrated hollow chainrings Hex socket: 10mm wrench Packing list: 3 x axle screw nut chain wheel Note: The chainring screw diameter is 18mm/20mm. The FC-4500 and FC-5600 FSA road chainrings are 18mm. For SHIMANO 590 596 XT XTR SLX, the integrated chainring is 20mm.