About this item 2 Sizes Provide the accurate installation position of the water thermometer . Different sizes for choice, meet your different requirements for different water pipes For Most Motorcycles The inline coolant switch is suitable for most motorcycles, high reliability, perfect match to your motorcycle pipe. External Diameter: 18mm, 22mm (Optional); Length: 5.5cm/2.2in Simple Installation Easy installation, with 2 durable adjustable clamps to fasten. Our temperature gauge adapter can be installed in the water pipe of the cooling water tank. Simplify installation steps, no modification, cutting, or drilling required Sturdy & Abrasion-proof Our motorcycle water temperature adapter is made of CNC high density aluminum alloy, sturdy, not easy to aging and abrasion resistant, to ensure maximum strength and durability for long lasting usage Specifications Condition: 100% Brand New, Material: Aluminum Alloy, Color: Black, External Diameter: 18mm, 22mm (Optional), Length: 5.5cm/2.2in, Package Weight: approx.58g, Fitment: Universal