Scubapro first stage piston tool bullet machined from brass for MK5 MK10 MK20 and MK25 service.

The Scubapro first-stage piston tool protects the fragile, critical sharp edge of a flow-through piston and prevents O-ring damage during assembly. It safely guides the piston mechanism through the first-stage regulator body.

To use it, position the tool on top of the piston so that the smaller diameter shaft slides inside. Push the combined piston assembly and bullet through the first-stage body, then remove the bullet from the opposite side once the piston is properly seated.

Designed to fit Scubapro MK5, MK10, MK20, and MK25 first-stage balanced piston regulators.
Functions exactly as the official factory Scubapro tool #43.027.101.
Ideal for installing and protecting the Scubapro composite piston assembly (Part number 10.600.155).

Technical Details:
Manufacturer: Scuba Service Tools
SKU: 4000-SST-002
GTIN: 8720828266298