1、Manufactured by mechanical finishing of aluminum alloy material, durable to use 2、Used to enhance the glass steel strength and flatness 3、In the process of products, it can save resin, save time and costs, improving construction efficiency 4、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 5、Can effectively improve the labor efficiency and product quality Description: 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.  Features: Manufactured by mechanical finishing of aluminum alloy material, durable to use. 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. Can effectively improve the labor efficiency and product quality. Specification: Condition: 100% Brand New Material: Aluminum alloy + ABS  Total Length: Approx. 31cm / 12.2inch Roller Head Length: Approx. 50mm / 2.0inch, 75mm / 3.0inch, 50mm / 2.0inch Product Weight: Approx. 323g Package Included: 3pcs/set * Bubble Paddle Tool Note:  1. Due to the hand measurement, there have size error about 1-2cm. 2. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. 3.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.