The Active Noise cancellation function digitally removes background noise from transmitting and receiving audio to provide clear communications in noisy maritime environments
proven and patented pressure arm system
the Vac N Blo is the most Powerful Hand Vac/Blower on the Planet
Suction Stop Sac Valve Threads
Medium frequency provides excellent shallow to mid-depth performance
Schaefer Double, Universal Head, Becket, Ball Bearing Boat Flying Scot The Active Noise cancellation functionDouble ball bearing block with aluminum cheeks and becket. Works with 506 25 or 506 45 for a 4: 1 purchase. Delrin(tm) ball bearing sheaves provide low friction and high safe working load. Swivel head may be locked in place to avoid twist. Sheave Dia. 2" (51mm), Thickness 1 21 32" (42mm), Width 2 1 8" (54mm), Length 6 3 16" (157mm), SWL 1500 lbs. (680kg), Weight 9. 1oz (258g), Max Line 7 16" (11mm) Works with 506 97 For boats to 30'