Octopus 38mm Bore Cylinder Seal Kit38mm Bore Cylinder Seal Kit Octopus autopilot drives 38mm bore cylinder seal kit. Octopus offers a selection of autopilot drive systems that are engineered to deliver unparalleled performance and years of reliable service on a wide range of vessels. Whatever your auto steering needs, from fishing boats and sailboats to yachts of all sizes and commercial vessels, Octopus has the right drive for you. Features: 38mm bore cylinder seal kit For 38mm