81mm Bore, 179mm Stroke, 80mm Rod Diameter, Yellow, Single Acting Application. Product: Hydraulic Cylinder for Log Splitter Piston Hydraulic Cylinder – 81mm Bore, 179mm Stroke, 80mm Rod Diameter, Yellow, Single Acting Application.Intended Use:Log splitter.1. Piston Rod (chrome rod also available): High tensile steel rod is precision ground, polished and hard chrome-plated to prevent damage & ...