Craftsman Marine can supply the required tunnels in various lengths and diameters.
The diameter of the tunnel depends on the chosen thruster. These tubes are made from GRV (glass fiber re...
Craftsman Marine can supply the required tunnels in various lengths and diameters.
The diameter of the tunnel depends on the chosen thruster. These tubes are made from GRV (glass fiber reinforced vinyl ester). Vinyl ester has the same strength as polyester but a better ability to withstand water absorption.