12 volt, black case as current colour (same ram as older grey case units). Including flanch, bolt and steel splint pin (20mm). Mounting bracket not included but sold separately: Eltrim Mounting Bracket. Allows a boat to have a slower planning speed, often essential for rough weather. Adjust the trim of your boat to show the designed angle of attack. Fetch your boat onto the plane faster, reducing fuel consumption at 'hump' speeds. Effectively add length to the hull, which can result in an improvement in performance and handling. Reduce the amount of heel in order to show the maximum amount of 'Vee', to the water rather than landing of the side of the ‘Vee', reducing both hull stress and the passenger stress of uncomfortable cruising. As fitted to all Sealine 12v boats with trim tabs (excluding later Lenco type). Sealine models 190, 195, 210, 215, 218, 220, 255, 260, 270, 28, 285, 290, 300, 305, 310, 320, 328, 330, 350, 360, 365, 380, 390, 400, 410, 420, 450, S Series, F series, T46, T47. Also available in 24V (for Sealine S48, T47, T51, T52): Eltrim 24V Trim Tab Motor. IMPORTANT: Bellows should to be changed every 2 years, available here: Eltrim Rubber Trim Tab Bellows (Pair). Original Sealine OEM supplied product. BritBoatParts.com are official suppliers of all Eltrim products in the UK.