DESCO 7590 Rubber D-Ring Heel Foot Grounder with 1 Megohm Resistor, 30" Length D-Ring Fastening System: Size adjustable material expands to fit most shoe sizes comfortably and flex during walking Extra-wide contact area: Additional surface area allows for a better path to ground Tear resistant rubber with inner scrim: Reinforced material prevents tearing - increasing the service life of foot grounder 30" Long, 8 conductive strand nylon polyester grounding tab: Additional conductive material provides reliable connection with operators sweat-layer Non-Marring interior layer: will not mar operators shoes