The King 2.5 PR 16-inch shock with 3-tube bypass and piggyback reservoir (style 6) is a 16" 2.5" PR shock combining a three-tube bypass arrangement with a piggyback-mounted reservoir. Style 6 identifies this particular build. The piggyback keeps reservoir fluid external to the main body while offering the staged damping characteristics of a 3-tube bypass layout.
King Shocks 16in 2.5 PR Shock 3 Tube Bypass Piggyback Reservoir Style 6