Doughty T58400 Twenty Clamp BK, Aluminum Die Cast Clamp, Load capacity: 20 kg, For pipes 48-51 mm, TÜV- Certified, Truss conserving due to extruded trigger, Both M10 and M12 screws can be used to fix the devices (M10 included), Dimensions (W x H): 28 x 100 mm, Weight: 0.28 kg, Made in England