Description
Imtra SM5017 Tunnel Aluminum 125 x 1500 x 5 millimeter Sleipner SNPFDL3 Non Tipping 10oz Rocks Tumbler Non Tipping 10oz Rocks Tumbler Teal 438 Gear Head the deeper the prop Tunnels which are too short allow the propeller to cavitate — which decreases performance and makes a lot of noise