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

Lowrance® HST-WSBL Transducer

Lowrance 000-0106-72 Transom-Mount 83/200 kHz Skimmer Transducer with Built-in Temp, Black : Electronics

Transducers for Fish Finders

Lowrance HST-WSBL TM Skimmer Transducer HST-WSBL 106-72 HST-WSBL Transom-mount, wide cone angle, 200kHz skimmer with built-in water temperature

Lowrance HST-WSBL TM Skimmer® Transducer

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

Transducers for Fish Finders

Lowrance 000-14884-001 9-Pin High Speed Transom-Mount Skimmer Transducer - M/H, 83/200 kHz : Electronics