Sea-Dog Stainless Steel Butterfly Vent - Center Knob - 5" [331450-1] Brand_Lopolight The ring diameter is large

The ring diameter is large enough for a can koozie

The FURUNO Free Synthesizer (FFS) Transceiver allows a wide selection of operating frequencies

This accessory is compatible with the following Humminbird products: HELIX 5 CHIRP G2 – GPS-equipped models only

Mode - Strobe

Time to lose those heat producing energy hungry MR11s and replace them with cool running low energy LEDs

Sea-Dog Stainless Steel Butterfly Vent - Center Knob - 5" [331450-1] Brand_Lopolight The ring diameter is largeStainless Steel Butterfly Vent Center Knob 5" Butterfly Vents promote air flow preventing mold, mildew, and associated odors. Features a center knob that allows for easy adjustment of the opening. Corrosion resistant 304 stainless steel construction. Installs with four #6 RH fasteners (not included). WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.