1. Unlike other sanding discs and paint removing wheels, these pads offer excellent wear resistance and do not damage aluminum while effectively removing tough paint, including on older airstream surfaces. For stainless steel tube polishing, these buffing pads help repair minor scratches and restore a polished shine. 2. This sanding and grinding wheel set is compatible with angle grinders and polishing tools. Ideal for cleaning, finishing, and polishing on metal, stainless steel, glass, jewelry, plastic, ceramics, marble, and wood crafts. 3. Nylon fiber flap discs with sandpaper effectively remove rust, paint, and coatings from irregular and curved surfaces without damaging the base material. Constructed with high-tenacity fiber and special viscose, resistant to water and oil, ensuring long service life. 4. Size Details: All angle grinder sanding discs are 4 inches in diameter with a thickness of 16mm (0.62 inches) and a center hole diameter of 16mm. 5. 8-Piece Nylon Fiber Flap Wheel Set: Includes 2 pieces of 120-grit green nylon fiber flap discs and 2 pieces of 240-grit red discs for high-speed sanding and heavy-duty material removal, providing fast and durable cutting performance. Also includes 2 pieces of 180-grit green nylon fiber grinding and polishing wheels and 2 pieces of 320-grit red discs, suitable for polishing and fine finishing across various applications, meeting needs from aggressive removal to final polishing. Color: Red + Green Material: Scouring pad Size: 100x16mm Diameter: 4 Inch Package Contents: 2 x 120# Nylon Fiber Flap Disc (Green, with sandpaper) 2 x 180# Nylon Fiber Flap Disc (Green) 2 x 240# Nylon Fiber Flap Disc (Red, with sandpaper) 2 x 320# Nylon Fiber Flap Disc (Red) Only the above package content is included; other items are not part of this package. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.