The flagship of ALPS roller guides are the 80lb. class roller guides. Precision CNC machined from 6061 T-6 marine grade billet aluminum, the frames of these roller guides are not only strong but extreme corrosion resistant. All other critical parts are SS316 stainless steel, including the screws, axle pin, and rollers, providing the same extreme corrosion resistance. Each axle pin has a custom teflon bushing that will reduce friction. As an added bonus, ALPS has an optional Japanese ball bearing, to nearly eliminate any friction and allow outstanding roller performance.