Features: brand new and high quality The gasket design can expand the contact area between each other, which can protect the accessories, and reduce the scratches and wear on the accessories. The gasket can move freely on the screw for head, but it will not fall easily, long service life is due to the use of advanced technology. At the same for time, it is not easy to fade and oxidate because of the use of coating coloring technology. And it also anti corrode. It is made from Aluminium Alloy, is durable to use. There are two sizes of the product to choose from. The long screws are usually used in the back of T250, while short screws are often used in the back of TX35. Specifications: Material: Aluminium Alloy Color: Black Package Weight: approx.5g Type Optional: Long/Short Diameter: approx.9.9mm/0.39in Height1: approx.15mm/0.59in Height2: approx.20mm/0.79in Package Includes: 1Pc x Bicycle Rear Derailleur Screws note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!