The balance clamp is arc-shaped as a whole, with large or small radian, and single side with barb, which can closely match with the cross flow centrifugal blades with similar shape, easy to add, and not easy to loosen. Weight range from 0.1g to 4.0g, made of 65 manganese elastic steel, blackened or galvanized or chrome plated, heat treated and tempered. Welcome to call for samples. If you don't have the right one, you can make it to order. (mainly used for dynamic balance correction of plastic or metal cross flow centrifugal fan)