This item is manufactured by mechanical finishing of aluminum alloy material, durable to use. It is used to enhance the glass steel strength and flatness. In the process of products, it can save resin, save time and costs, improving construction efficiency. Widely used in industrial production of glass steel, for leveling and compacting the resin coating driven bubble, commonly used for products' internal and surface blistering roll puncture. It also can effectively improve the labor efficiency and product quality. Total Length: . 31cm / 12.2inch Roller Head Length: . 50mm / 2.0inch, 75mm / 3.0inch, 50mm / 2.0inch Product Weight: . 323g Colour:silver Material:Aluminum alloy Package Contents: 1 set x Fiberglass Roller Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.