Title says it all. I designed this to mount the air assist under the table that houses my laser engraver enclosure. You can mount it up right or upside down. You will need two-sided tape, a 4.8x15mm M5 bolt and four screws - self-tapping countersunk screws work best. Thread the bolt through the base until it is flush and a few mm of thread are sticking out, then apply the two-sided tape to the underside. Remove the backing from the tape and place where you want the pump to be mounted. Press firmly and hold for several then insert screws into the 4 mounting holes. Put the shock absorbers on the rubber feet and then place the air pump over the center bolt and turn to tighten. It will become tighter as you turn it until it is seated very firmly. You can move it back and forth to adjust to your liking. Best mounted on a heavy, stable surface - otherwise you'll have a lot of vibrations.