A. SIPHON blaster booth lets gravity feed the abrasive into the sandblast gun.
B. PRESSURE BLASTER puts the sand under controllable pressure to enable you to control the speed at which the sand is blasted from the nozzle of the blasting gun making it easier to etch faster and deeper into the glass with less psi required.
All "booth type" sandblasters are SIPHON blasters. Siphon and Pressure blasters require at least a 5 HP compressor with 125 psi and 6-25 working cfm with the large tank
Abrasive grit needs to be purchased separately.