Description: 1. product performance: insert and open the product repeatedly to see if there are any sticking and unsmooth phenomena. good products can be inserted and opened smoothly (compared with your own car), and the button part of the tried products is still bright. 2. The thickness of the belt is between 1mm and 1.2mm. (1mm is required by the national standard and 1.2mm is required by the European standard). The thickness of the mounting plate of the mounting screw is 3mm. There is a plastic pad at the connection between the belt and the iron to protect the belt from damage. 3, the number of sewing stitches should be more, and the tension of sewing thread should be large. 4, pattern sewing line head beautiful. 5. There is no bright face of water chestnut on the buckle, and it will not fade after repeated insertion and opening. Feature: Type : seat extension belt Material :ABS+ Metal Product specification : Total length: 230mm, width: 47mm, thickness: 1.13MM, socket width: 21.5mm Shopping Tips: 1.This product can be used for models with bolt width of 2.1cm-2.2cm. Most cars are of this size. 2. If the bolt of your vehicle is 2.45cm-2.53cm, please do not buy it. 3. It's better to check the width of the iron sheet of the original car. The size of the original car is more than 2.2CM or the iron sheet of the metal part whose length is less than 3cm can't be used. Please be sure to accurately determine the width of the metal bolts of the [front row] or [rear row] where you need to use it before buying, because some models have different widths of the front and rear bolts, and the middle and both sides of the rear bolts The width is also not uniform. Warm Tip: You cannot measure the width with a tape measure. If the tape measure has shrinkage, please use a caliper to measure it more accurately.