For non-AquaTech Bulkheads.
The AquaTech M16 Bulkhead Step Adapter is purpose-designed and allows for other M16 bulkheads with a shorter thread length to be adapted for use with AquaTech water housings.
The M16 Bulkhead adapter features a pass-through opening for the required cabling, and it is easy to install via an existing bulkhead opening on your water housing.