This bundle includes a Kicker 47KMFDB3 ABYC Compliant Fuse Holder And Distribution Block, and a Kicker 47KMDB3 ABYC Compliant Ground Distribution Block. The Kicker 47KMFDB3 Fuse Holder and Distribution Block ensures safety and compliance with Coast Guard and ABYC standards in marine construction. Fuse every amp for protection, accommodating MRBF marine fuses. With the ability to protect up to three amplifiers, this distribution block is a reliable choice for your onboard power needs. On the other hand, the Kicker 47KMDB3 Ground Distribution Block provides a secure connection from your amplifiers to ground. Designed specifically for marine use, it accepts three ground wires and adheres to Coast Guard and ABYC standards. Utilize RT-Series ring terminals for optimal connection reliability. Both blocks are essential components for your marine audio system, offering durability, compliance, and peace of mind. Upgrade your boat's electrical setup with these quality Kicker products to enhance performance and safety on the water. Dimensions: 47KMFDB3 - (insert dimensions here), 47KMDB3 - (insert dimensions here).