Feature: 1. Suitable for 3AAA battery, 16850 battery flashlight, applicable lamp tube diameter 2.7cm or less. 2. The use of high-quality plastic, strong and durable. 3. Two highly elastic anti-slip gasket, solve the defects of the ordinary light frame clip is not tight. 4. Light frame installation is simple, flashlight loading and unloading is also very convenient. 5. The use of metal center shaft improves safety. 6. This new plastic material is soft, non-brittle plastic. Wrapped tightly, the flashlight clip more securely. Specification: Name: Mountain Bike Light Frame Color: Black Material: ABS Plastic, Metal Weight: About 45g Size: Upper Mouth Diameter: About 2.6cm/1.02in, Lower Mouth Diameter: About 3.5cm/1.38in