They're used as replacements for valves that no longer activate flushing

Haws Green ABS Plastic Anti-Surge Soft-Flo Eyewash Head With Built-In 1

Gravel bags are a basic BMP (Best Management Practice) used to meet regulatory requirements for stormwater and erosion controlThe sizes are industry standard and allow the user to fill them up with as much or as little gravel as the application requiresDifferent sizes lend themselves to different applications

Cross Reference: Century 419

Overall Width: 2 3/8 in

Brady 73 ft Absorbent Roll, Fluids Absorbed: Universal, Heavy, 12 gal, 1 EA - MRO15-DPS Nominal Size-24" X 1.25" They're used as replacements forThe MRO Plus Heavy Roll absorbs all industrial liquids including water, petroleum based, and chemical based fluids. Its 3 ply construction makes it stronger, more durable, and reduces lint. The pad is perfed up the center so you can take only what you need and reduce waste. Refill for the Spill Kaddie.