Description: Precise thread design makes it stable and not easy to loose. Integrated design makes it lightweight while ensuring high strength. Sealed bearing design helps prevent water or dust from entering to extend service life. Aluminium alloy shell design makes it wear resistant and tough. Made of high quality aluminium alloy and resin material, it is durable. Arrow indicates tightening direction. L stands for rotation to the right,R stands for rotation to the left. The length of the product is 9cm-9.5cm, the outer diameter is 0.44cm, and the inner diameter is 0.24cm. The outer diameter of the washer is 0.42cm, the inner diameter is 0.35cm, the thickness is 0.25cm. The applicable shell width is 6.8cm-7.3cm. It is suitable for mountain bikes and road bikes. It is compatible for Prowheel 24mm or BC1.37-24T crankset. Item Name: Bottom Bracket Material: Resin,Aluminum Alloy Features: Wear-resistant, Lightweight, High Strength Size Details: Length: 9cm-9.5cm/3.54"-3.74" (Approx.) Outer Diameter: 0.44cm/0.17" (Approx.) Inner Diameter: 0.24cm/0.09" (Approx.) Washer Outer Diameter: 0.42cm/0.17" (Approx.) Washer Inner Diameter: 0.35cm/0.14" (Approx.) Washer Thickness: 0.25cm/0.1" (Approx.) Applicable Shell Width: 6.8cm-7.3cm/2.68"-2.87" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: Style A: 1 x Teethed Bottom Bracket 3 x Washers or Style B: 1 x Press-fit Bottom Bracket 1 x Washer Precise thread design makes it stable and not easy to loose. Integrated design makes it lightweight while ensuring high strength. Sealed bearing design helps prevent water or dust from entering to extend service life. Aluminium alloy shell design makes it wear resistant and tough. Made of high quality aluminium alloy and resin material, it is durable. Arrow indicates tightening direction. L stands for rotation to the right,R stands for rotation to the left. The length of the product is 9cm-9.5cm, the outer diameter is 0.44cm, and the inner diameter is 0.24cm. The outer diameter of the washer is 0.42cm, the inner diameter is 0.35cm, the thickness is 0.25cm. The applicable shell width is 6.8cm-7.3cm. It is suitable for mountain bikes and road bikes. It is compatible for Prowheel 24mm or BC1.37-24T crankset.