Features: This item is made by mechanics finish aluminum alloy material, durable to use. It is used to improve the strength of glass steel and flatness. In the process of it, it can record in resin, save time and costs, improve the efficiency of the construction. Widely used in industrial production of glass steel, to check the compactness level and the coating of Driven bubble, commonly used for “internal and stunning puncture surface. It can also effectively improve the efficiency of work and product quality. Specification: Condition: 100% Brand New Material: Aluminum Alloy + ABS Total length: approx. 31 cm/31 cm. Roll head length: approx. 50mm/5cm, 75mm/7.5cm, 50mm/5cm Product weight: about 323g Package includes: 3 pcs/set * paddle bubble tool. Note: 1. Due to manual measurement, there may be an error of approximately 1-2 cm. 2. Item colour displayed in photos may be slightly different on your computer monitor since monitors are not calibrated the same.