Fresh Products Wave 3D Urinal Deodorizer Screen, Yellow, Citrus, 10 Box FRS3WDS60CITBX Capacity 500 C fold or 800 multi fold towels Gravel bags are a basic 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 and rub the problem away More freshness with ten times more fragrance for 30 days Flexible translucent vinyl screen allows full view of urinal drain to ensure optimal flow while trapping debris