Length: About 32mm. Material: Aluminium Alloy. Color: black, red. Fit for 4mm/4.5mm outside diameter derailleur line. Quantity: 2pcs. Package Include: 2pcs Bike Shifter Cable Adjustable Screws. Features: DURABLE: This bicycle adjuster bolt is lightweight, reusable and durable. HIGH QUALITY: This bicycle adjuster bolt is made of aluminum alloy, CNC numerical control forming, finely crafted. COLORFUL: The surface of the product is anodized, colorful colors for you to choose from. UNIQUE DESIGN: This product uses a unique internal thread design, smooth adjustment. CYCLING PARTNER: The product's high elastic stainless spring is good for you.