Chain Tensioner - New and high quality, adopt iron + plastic material, which is durable for long times. Chain Adjust Tensioner - Easy to install, lossless body, adjust the chain automatically, avoid manual adjustment. Chain Adjust Tool - With very solid and durable design, effcient to prevent the chain fall for flabby. Motorcycle Chain Tensioner - Improve the safety of driving abrasion resistant and durable, greatly improving the tires inadequacies. Adjustable Chain Tensioner - Suitable for most motorcycle, motorcycle modified parts adjust the large chain tensioner automatically. Specifications: Color include: black, blue, red, yellow Size: roller size 6.5 * 4 cm Package includes: 1pc * motorcycle chain ware Notes: Circular frame fixed when the need to use rubber and other objects wrapped in a good pad and then installed. Screws need to lengthen the need for buyers according to the height of their own car to buy. Please buyers first measure their own vehicle size, to avoid the purchase of goods inappropriate.