1. Marine gearbox Model138 has the capacities of ahead and astern, clutching and disclutching, reducing speed and carrying the propeller thrust. 2.The said gearbox possesses reliable construction,smooth clutching, easy maintenance, Beautiful shape. 3.Work stably, Low noise, and durable application, particularly, big transmission power, small bulk and light weight. 4.All products are approved by ABS, BV,CCS,DNV, GL, LR, NK,ect, Certificated of quality system ISO9001:2000.