The JConcepts RM2 Clear Differential Lube is a lubrication option for racers looking to tame the power and provide the all-important drive and acceleration necessary to win at the highest level. During a fresh build or re-build, apply the clear lube into the main gear diff-ball holes and then install the (not included) diff balls. After popping the diff balls down into place inside the gear, apply another layer of clear lube over the top to cover and smooth the area. Use a liberal amount, enough to fill the voids, and assemble the rest of the diff. Features: High quality lubricant, thick consistency Enough quantity for several builds or re-builds Clean and simple container for application and storage