The Blak-JAK HydrA-Lign rodassembly is designed to reduce operational risk exposure and improve risk environments during change-outs of high use fluid expendable parts. Additional value to operators and contractors is realized through design features that allow self-aligning capabilities between the pump liner and piston. Run times of expendables will be positively affected and pump downtime reduced. The Blak-JAK HydrA-Lign rod can be used on all popular makes and models.