Feature:1. Fitment: Replacement for Coleman Powersports CT200U; Replacement for Baja Motorsports; Replacement for Hensim; Replacement for TrailMaster, etc.2. High Strength Material: The chain tensioner and 420 chain are made of steel alloy, which are wear resistant, rust proof, durable and can be used for a long time. Easy to install and operate.3. Tensioner Function: The chain tensioner is an important part of the drive system. It can ensure proper chain tension and alignment, prevent the chain from derailing during driving.4. Chain Function: 420 chain ensures the engine life and the most efficient performance. 420 main chain link can be used to adjust the chain length according to the condition of your mini bike.5. Package Included: This kit includes 1pc chain roller tensioner, 1pc spring, 1pc 420 chain 42L link and 2pcs master link, high reliability.Specification:Item Type: Chain Roller Tensioner with ChainMaterial: Steel AlloyFitment:Replacement for Coleman Powersports CT200U, BT200X, CT200U-EX, CT200U-EXR, CT200U Trail, CT200U-A CT200U-ACReplacement for Baja Motorsports Mini Bike MB165 MB200 (Heat, Mini Baja, Warrior)Replacement for Hensim Mini Bike MB165 MB200 (Heat, Mini Baja, Warrior)Replacement for Massimo MB200Replacement for TrailMaster MB200Replacement for Falcon 200 Mini Bike.Package List:1 xTensioner 1 x Spring1 x Chain2 x Chain LinksNote:Please check the picture, model and size of the product as carefully as possible before purchasing. If you are not sure whether the chain tensioner is suitable, please leave a message for help.