U.S. Customers: Orders shipped from Canada may be subject to U.S. import duties, taxes, and/or tariffs as assessed by U.S. Customs and your carrier. These charges are not included in our product prices or shipping rates. You are responsible for any duties/tariffs/fees due on delivery or prior to delivery.
Packed and shipped within Canada!

Original & OEM Quality Parts

Poly Planar
MB21B

Poly-Planar Mb21B Waterproof Vhf Extension Speakers Surface Mount 8W 2-15/16" X 2-3/4", Black - Mb21B - 665-Mb21Bf1

LSN 665-MB21B MPN MB21B UPC 731128002118 MFR Poly Planar
Express
ON, Warehouse

"Express" items are automated and typically shipped out next available business day and delivered within 4 day.
In Stock
$40.18
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Waterproof VHF extension speaker can be mounted in any convenient location and feature polypropylene speaker cones with stainless steel grills and mounts. Includes a 10' lead wire with mini-plug.

Part #:665-MB21B
Manufacturer:POLY PLANAR
Manufacturer Part #:MB21B
UPC:731128002118
Order In Multiples Of:1
Rating8W
Size2-15/16" H x 2-3/4" W x 1-5/16" D
ColorBlack

Variations
665-MB21WPoly-Planar MB21W Waterproof VHF Extension Speakers Surface Mount 8W 2-15/16" x 2-3/4", White
665-MB41WPoly-Planar MB41W Waterproof VHF Extension Speakers Surface Mount 10W 4-5/8" x 4-5/8", White
665-MB41BPoly-Planar MB41B Waterproof VHF Extension Speakers Surface Mount 10W 4-5/8" x 4-5/8", Black
665-MB41Poly-Planar MB41 Waterproof VHF Extension Speakers Surface Mount 10W 4-5/8 x 4-5/8", Black
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Our products are shipped from Canada!
Parts Warehouse:
Toronto, Ontario, Canada
Head Office:
Kingston, Ontario

About Us

Northern Marine is a Canadian supplier of OEM and premium aftermarket marine and RV parts and accessories. We focus on quality, accurate listings, and dependable fulfillment so you can maintain, repair, and outfit your boat or RV with confidence.

Our goal is simple: get you the right parts, shipped fast, with straightforward service you can count on.