Refurbished Grass 850 or 850-01 Hinge - Springs are good and the action is smooth.

What does "Refurbished" mean to me?  These hinges arrive to us from various sources and in various conditions. We separate the usable from the unusable. The springs and pressure pins are salvaged from the unusable hinges.  The usable are cleaned in a solvent with rust inhibitors and inspected for operation. Springs and pressure pins are replaced as needed. A high quality grease is applied to pivot pin, pressure pin and spring ends. The hinges are tested again for operation before final approval.