The key benefits over the OEM product are all alloy construction, durability and with a much larger ram they offer better reliability and smoother operation.
Good for airplanes from 12 to 25lbs. Heavy duty oleo strut mounts with no pins so it won't break in a hurry. Priced individually. Available as replacements for Robart 631 85 degree, 630 90 degree, 636 85 degree and 635 90 degree mechanisms.