Springfield 2-3/8" Locking Fixed-Height Post - 13" [3300713] Marine Plumbing & Ventilation | Accessories The GSD 25 premium sonar

The GSD 25 premium sonar module is a remote network solution that provides outstanding fishfinding and bottom tracking capabilities

and from shock pressures (pipe hammer)

TE01 rotary controller

Mounting Style: Low Profile Thru-Hull

Springfield 2-3/8" Locking Fixed-Height Post - 13" [3300713] Marine Plumbing & Ventilation | Accessories The GSD 25 premium sonar2 3 8" Locking Fixed Height Post 13" Anodized to withstand all conditions. Heights are from the top of the post to the deck when the post is installed. Fits into any 2 3 8 Plug In base (sold separately). Use with any 2 3 8 Trac Lock swivel (sold separately), swivel adds 3 4 to height.