Boss Audio 4" MR4.3B Box Speakers - Black - 200W [MR4.3B] Boat Outfitting | Trim Tabs Stud dimensions: 3/8" x 3/4"

Stud dimensions: 3/8" x 3/4"

The Straight shaft drive unit replaces the manual drive used on cable steered boats and is mounted directly behind the dash

the timed flush feature can be adjusted on the panel without having to remove any components

287 7/8" Round Rail Mount

AIS Class: Both A & B

Boss Audio 4" MR4.3B Box Speakers - Black - 200W [MR4.3B] Boat Outfitting | Trim Tabs Stud dimensions: 3/8" x 3/4"4" MR4. 3B Box Speakers White 200W Whether you are at a boat party or spending a day out on the lake, you can enjoy the premium quality sound of the BOSS Audio 3 Way Marine Enclosed Speaker System. This enclosed marine speaker system features a tweeter and 1. 5" polypropylene cone. Swivel brackets are included for a smooth, simple installation process. The versatile speakers can also be installed indoors or on the patio, giving you plenty of options