Three cylinders

The switch cannot be operated with the cover down

Standard SSM-21A Speaker MicrophoneModel: SSM-21AThe SSM-21A is a high performance Submersible speaker microphone desiged especially for their hand held transceivers

INCLUDES: epoxy coated aluminum handles with locking tab and arrows to indicate flow path

companionways

SRLP100 Retractable Thruster Unit 90Deg Motor 12v Reverso Three cylindersSleipner#39; s (Side Power)range of proportional speed control DC thrusters allow you to select the power you need for precise boat movements in any weather and sea conditions. The unique quot; holdquot; feature allows you to keep the boat in position at dock or in locks. Other items to consider when purchasing a new thruster: Bow TunnelorStern Tunnel Control Panels andAccessories Radio Remote Controls (on off only) AutoMainswitch or manual Battery