This is the finished product. There are several kinds of wheels. There are two specifications, one is for 28mm track and the other is for 20mm track, according to the customer's choice. A roll we can according to the requirements of customers, can be 40 meters a roll, can be 50 meters a roll, each meter can be packed with plastic film, a box can be loaded with 8 rolls, a roll of 50 meters。The distance of the wheel is 6 cm, 7 cm, 8 cm and 10 cm, the distance of the cloth with nails is 107 mm, 125 mm and 145 mm, the length of a roll can be customized according to your needs!