ACCU THERMO PROTECTIVE PLUG - Ammonite System

Ammonite System ACCU THERMO PROTECTIVE PLUG

A new improved version is higher, made of anodised marine class aluminium and in stylish red colour.
Double o-rings and long thread ensure supreme protection against flooding as long as properly screwed.
Speaking of which, in the third generation plug's upper part is drilled right through.
The hole allows using thin metal or plastic rod as a lever whenever the port is too tightly sealed.