The UniPower is a single-speed winch that combines the advantages of a low-profile manual winch with the power of a 12- or 24-volt, low-amp-draw motor. What makes it unique is that the motor is partially imbedded inside the drum, so that it extends only 105 mm (4 1/8 inches) below the winch basea critical feature for small boats where space under the cabin top is limited. Composite roller bearings reduce friction under load and dont require lubrication. Gears are 17-4PH stainless steel for strength and durability. Harken recommends the single function digital switch DSSBK and circuit breaker HCP1717. Sold separately.MaterialAluminum ConfigurationSelf-tailing Speed1 Drum Ø (mm)110 mmDrum Ø (in)4 3/8 inBase Ø (mm)190 mmBase Ø (in)7 1/2 inHeight (mm)215 mmHeight (in)8 1/2 inLine entry height (mm)100 mmLine entry height (in)3 15/16 inMinimum line Ø (mm)8 mmMinimum line Ø (in)5/16 inMaximum line Ø (mm)14 mmMaximum line Ø (in)9/16 inFastener circle (mm)160 mmFastener circle (in)6 5/16 inFa