Feature: Compatible with 4030-PRO and most 3018 series CNC machines on the market, including 3018-PRO, 3018-max This dust cover is made of high-quality materials. The design allows you to monitor your operations clearly. Equipped with a 23mm long nylon brush to maximize vacuum suction and help sweep away dust with high dust removal efficiency. Keeps your machine and work area clean during cutting, drilling, and carving. Two-piece magnetic design: Durable, lightweight, and flexible, convenient for daily use and maintenance. Easy to assemble and install in just 3 steps. The split design allows for easy bit replacement. Simply remove the bottom cover when changing bitsno tools requiredand avoid complicated procedures. Spindle Diameter: 45mm / 52mm Material: Plastic Color: Black Package Contents: 1 x Dust Cover Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.