We need a double clamp with the quick release. Something similar to the attached picture. Main dimensions: - The diameter of the tube, where we want to use the clamp: 33,2 mm - The height is minimum 30 mm (to have enough space for the quick releases) Please send us your electronic catalog with proposals. The quick releases and the clamp are used for bicycles, called: seat clamp. So for the the quick releases we don't have drawing you can buy from many company. The problem is: they have only one quick release and not two. We need similar types for this seat clamps but with two clamps and internal diameter: 33.2 mm.