Plastic drag chain model is to determine, according to the internal height andwidth because its is not standard product, the outer size of each manufacturerare inconsistent. Plastic drag chain model has 7 * 7, 10 * 10 * 15 * 15, 10, 15,15 * 35 * 20, 15, 15 * 50 * 40 * 40, 15, 15, 17, 18, 19 * * 25 * 35 * 50 * 60 1616, 25, 25 * 25 * 38 57, 25 * 25 * 77 * 60 d, 50 d, 103 d * * * 75 d * 100 d *125 d * 150 d * 175 d * 200, 50, 60 * do * * * 75, 150, 125, 100, * * * 100 * 95* 125 * 175, 56, 56, 56, 56 * 200 * 300 and 55, 56,62,65,80 series of dragchain, etc.