OCTURA 1200 SERIES 55MM DIAMETER BOAT PROP One of the original props from OCTURA. These have a low 1.2:1 pitch to diameter ratio with a 3/16 bore for drive dog use. They are ideal for convetional underwater use. Most are made in glass filled plastic but Octura have recently produced a few of them in BeCu, a 1240 a 1240/3 and a 1245 along with the 1250. These have found use on both IC motors and electric motors. Also available in 1400 series which is 1.4:1 pitch.