Heel Grounder Cup Style-High Visibility P/N: HGC1M-N72-BLU P/N: HGC2M-N72-BLU Blue elastic velcro provides a comfortable, secure fit, and good visibility for compliance verification. The durable, double life span tennis sole is made from 3-layer rubber and will not mark shoes. Made in the USA, this quality grounder features UL listing for safety, a lot number, and a 24 inch multi-strand ribbon. Select a 1 meg (HGC1M-N72-BLU) or 2 meg (HGC2M-N72-BLU) resistor.