Paslode Pneumatic 2.5-in 16-Gauge Finish Pneumatic Nailer Exercise Mat Q: What does USS mean

Paslode Pneumatic 2.5 in 16 Gauge Finish Pneumatic Nailer Exercise Mat Q: What does USS mean Q: What does USS mean for these washers 75 Material Wood Wood Species Oak Finish Type Unfinished Manufacturer Color Finish Natural Color Finish Family Brown Color Shade Light Style Transitional Panel Style Flat panel Door Cabinet Style Square Number of Doors 1 Number of Drawers 1 Number of Shelves 0 Door Swing Reversible (right hand or left hand) Fronts Sold Separately No Production Method Stock (prefabricated) Drawer Construction Furniture board Box Construction Furniture board Overlay Partial overlay Adjustable Shelves No Soft Close No Stainable Paintable Yes Moisture Resistant No Toe Kick No Reversible Door Yes Door Height (Inches) 22