IMPROVE STRENGTH AND PLEASURE Different from other similar rollers, this fiberglass roller is manufactured with concave and convex surface, easy to use and used to improve the strength and flatness of glass steel. GOOD ALUMINUM ALLOY This FRP bubble roller is made by aluminum alloy material mechanical finish than others. ERGONOMIC DESIGN Use this roller to save time and effort to effectively improve labor efficiency and product quality. Description: This is a fiberglass roller used to compact the resin coating and drive bubble at surface and internal of FRP product. It is made of aluminum alloy and ABS handle, easy to use and long lasting. Features: Mainly made of premium aluminum alloy manufactured by mechanical finishing, high strength and durable in use.Ergonomic ABS handle is comfortable to grip without fatigue after a long time use.Widely used in industrial production of fiber reinforced plastics to enhance the strengthen and flatness.Light weight and portable, easy to use and effort saving. To compact the resin coating and drive bubble at surface and internal of FRP product, also can help to save resin and reduce cost. Please allow 0-2cm error due to manual measurement. Thanks for your understanding.Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Specifications: Condition: 100% Brand New Material: Aluminum Alloy + ABS Color: Silver + Black Type: 50*50mm, 10*50mm, 21*75mm, 3pcs/set (Optional) Rolling Part Size: approx. 50*50mm / 1.97*1.97in, 10*50mm / 0.39*1.97in, 21*75mm / 0.83*2.95in Weight: approx. 109~329g Package Included: 1pc/ 3pcs x Fiberglass Roller (as your choice) Wide Application: Widely used in industrial glass steel production, for leveling and compacting resin coating driven bubble, commonly used for internal and surface boring of bubble roller.