Size :35-40mm Mid ClampFeatures:1. Install smaller solar panel systems with ease and comfort by ordering this kit.2. The solar panel clamp is ideal for positioning solar panels at an angle on a rooftop.3. The tilt mount is designed to allow adjustment of the panel for optimum performance.4. However, please note that angle adjustability will decrease as the panel size increases.5. Maximum tilt angles depend on the size of the panel.Specifications:Material: AluminumScrew Thread: M8T Sliding Nut: M8Clamping Range: 35-40mmSOMETHING ABOUT US:TOUHIA have the customers satisfaction for their first priority.If you have any questions, please feel free to contact us by mail FIRST and we will offer our best service for you.