With Scubapro's MK25 you get the very best from Scubapro. This piston first stage uses all of Scubapro's technology to create the best and most stable regulator in their range. The MK25's piston is built with a silicone layer to prevent freezing of the piston itself and is designed to be able to release its cold without the risk of freezing. Scubapro's MK25 balanced piston provides great flow, even when the tank is close to empty. This balanced piston incredibly short response time, between your need for air and the actual delivery. The Scubapro MK25 has 5 intermediate pressure outlets on a swivel chair, giving you the freedom to position regulators exactly as you want them. In addition, the MK25 has 2 high-pressure outputs that sit opposite each other for freedom with the placement of your manometer.