Boat Leveler Hydraulic Cylinder 
Impact resistant, fiberglass reinforced nylon cylinders eliminates expansion and resists ultra-violet rays. Two expanding type seals, plus O-ring, eliminates high and low pressure leaks. Barbed cylinder fitting and an inserted tubular rod prevents hose blow-off and breakage.
Cylinder is 7 1/2 inches eye to eye when closed.
We Also Recommend
Stearns Work Master Vest - Oversize 
Rule 1100 GPH Electronic Sensing Bilge Pump - 24V [27SA-24]
BoatLIFE Life Industries Sanitizer Solution - 32oz Spray