Notrax Antifatigue Runner, 12 ft x 4 ft, 1 EA - 509S0412YB Frame Finish-Polished the shell and flange are

the shell and flange are outfitted with two countersunk holes for mounting

It's suitable for both indoor and outdoor entryways

Cross Reference: Bell & Gosset 3K520

for 2-Drum Model

Notrax Antifatigue Runner, 12 ft x 4 ft, 1 EA - 509S0412YB Frame Finish-Polished the shell and flange areAntifatigue Runner; Mat Shape: Rectangle; Color: Black with Yellow Border; Width: 4 ft; Length: 12 ft; Thickness: 9 16 in; Mat Surface Pattern: Diamond Plate; Mat Surface Material: Vinyl; Mat Backing Material: Vinyl Foam; Weight: 64 lb; Edges: Beveled; Standards: ASTM C1028 96, ASTM D 1004 94a 03, ASTM D 2859, ASTM D2240 02, ASTM D3884 01, CPSC FF 1 70; Mat Electrical Resistance: Electrical Properties Not Tested; Flame Resistant Fire Retardant: Not