FishTec HD Fishing Charts - Know your Lowrance transducers - The most commonly known transducer is by far the 200kHz Skimmer or HST-WSBL or High Speed Transom - Wide Skimmer BLue plug.

Lowrance HST-WSU 200 KHZ Transom Mount Transducer, Fish & Depth Finders - Canada

Lowrance Transom Mount 20 Degree Skimmer : : Sports & Outdoors

LOWRANCE HST-WSU T/M 20DEG SKIMMER 200KHZ 149-000010648 - Golden Anchor Marina

Hook-5X With HDI Skimmer Transducer, Fishfinder, Lowrance

Transducers for Fish Finders

Lowrance 9-Pin High Speed Skimmer Transducer M/H

Lowrance® HST-WSBL Transducer

Lowrance Xdcr, HDI Skimmer 83/200 455/800KHz : Sports & Outdoors

Lowrance HST-WSBL 200 KHZ Transom Mount Transducer, Fish & Depth Finders - Canada