Astro Pneumatic Masking Machine 18” MM18 Description: The Astro Pneumatic Masking Machine 18” MM18 includes bars for 2 paper rolls and 4 tape rolls. Featuring large adjustable washers to maintain paper alignment, and a sharp, andodized blade for smooth cutting. The Astro Pneumatic Masking Machine 18” MM18 has wing nuts for easier paper loading, a large storage tray on bottom for tools, and a sandpaper tray on side and bar for holding a spray gun.