This self-contained hydraulic pump system lifts the biggest four-stroke and V6 outboard engines from bottom to top in less than eight seconds. No reservoir or lines. Installs in half the time of other jack plates. A super abrasion-resistant polymer rod and slot-lifting design provides trouble-free lifting. Rods made of self-lubricating material. Jack plate features a one-piece hydraulic unit. Easy two pin removal. Safe for use in saltwater or freshwater. Setback Sizes: 4", 6", 8", 10".