Air. You need it to play paintball. It also comes in handy for breathing. Make your own compressed air for paintball with the Alkin W31 Mariner Vertical compressor! This vertically-configured, compact yet powerful and efficient paintball air compressor is packed with features for reliable, smooth operation for the production of air for filling paintball or other air gun air tanks and bottles! This Alkin paintball compressor is manufactured to the highest standards for quality, safety and reliability and is ideal for smaller paintball park or pro-shop owners looking to produce their own paintball compressed air efficiently and safely.