Details
Bay Marine Supply MRBF Terminal Fuse Block Kit (Fuse Included) – Single Stud 5/16" (M8) Compact Marine Rated Battery Fuse 200A

TERMINAL FUSE BLOCK KITS (Fuse Included) – Links to MRBF Fuses & Fuse Block listings for purchase separately can be found below in the description
Fuse Mount Kit Includes: (1) Single MRBF Terminal Fuse Block, (1) MRBF Fuse of your choice between 30-300 Amp, (1) Red Insulator Cap, (1) Washer, (1) Lock Washer, (1) M8 Hex Nut
Fuses have a Max Voltage Rating: 58V –– Fuse Holder have an Amperage Rating: 30-300A –– Fuses Holder Stud Size: M8 (5/16") –– Fuse Holder Mounting Hole: M10 (3/8")
Compact, high-amp fuse appropriate for DC Main, inverters, windlass, and bow thruster circuit protection. Provides high current protection in tight space constraints. Ignition protected when used with MRBF Terminal Fuse Blocks. Isolated stud design uses standard M8 hardware and permits stacking of terminals.
IGNITION PROTECTED – Safe for installation aboard gasoline powered boats. IP66 – Protected against powerful water jets. 10,000 AIC at 14V DC satisfies ABYC requirements for DC Main circuit protection on large battery banks. [WARNING: Do not mount fuses directly on battery terminals. Must use with Terminal Fuse Blocks.]
Bay Marine Supply brand MRBF Single Terminal Fuse Block Kit - Marine Rated Battery Fuse 30-300 Amps
Cooper Bussmann is the Original Equipment Manufacturer (OEM).
These parts are of the same quality as Blue Sea's brand as their OEM is also Cooper Bussmann.

Kit Includes:
(1) MRBF Single Terminal Fuse Block
(1) Red Insulator Cap
(1) Washer
(1) Lock Washer
(1) M8 Hex Nut
(1) MRBF fuse size of your choice between 30-300 Amps (fuse sizes listed below).

Fuse Size List:
30 Amps
40 Amps
50 Amps
60 Amps
75 Amps
80 Amps
90 Amps
100 Amps
125 Amps
150 Amps
175 Amps
200 Amps
225 Amps
250 Amps
300 Amps