Hydraulic cylinders with stroke lengths of 5, 8, 10, and 12 in. have their own power unit. Pump, motor, reservoir, and cylinder in the same housing eliminate need for hoses. They are completely submersible. No-leak and wiper seals keep dirt and water out of working parts. They have an extend and retract thrust of 5000 and 3750 lb, respectively, and travel at speeds of 15 in./min with pressures from 2500 to 3000 psi.

CMC Marine Products Inc., Duncan, Okla., (800) 654-3697; www.cmcmarineproducts.com