The Micro Regulator from Polarstar is an extremely compact regulator standing at less than 3 inches, and is compatible with any HPA or SLP tanks, thanks to the integrated universal threading. Using a Micro Regulator eliminates the need for an external UFA which then creates a slimmer, more maneuverable profile. The innovative on/off switch allows the user to depressurize their HPA system before removing the tank. This feature helps to greatly reduce damage done to the tanks o-rings, which are ideal for maintaining a perfect seal. For added player preference options, this regulator is capable of adjusting the output pressure from 40 PSI to 145 PSI. The revolutionary, yet simplistic, design requires 3 high quality o-rings for optimal reliability and ease of maintenance. Slim down your HPA system with this Micro Regulator from Polarstar.