Use the Scubapro drift tool to make the removal and installation of the high-pressure seats as well as the small backup O-ring and washer in the body of the Scubapro MK11, MK16, MK17, MK18 / Tusa R400 a piece of cake.
 
When removing the high-pressure seat use the air gun from the top side of the first stage and the tool from the bottom side to remove the HP seat.
 
The drift tool for Scubapro diaphragm first stage is precision machined from white acetal.
 
GTIN: 8720828266397