Physical characteristics heel grounder rubber
    Thickness 2.0 – 2.7mm
    Elongation: 330%
    Tension: 44.0 Kg/cm2
    Hardness: 73˚ ± 10%. Shore A black side
                     66˚ ± 10%. Shore A white side
    Abrasion: 300 mm3 wear of black side
    Tear resistance: 26.4kg/cm2 
    
    
        Electrical characteristics
    
    
        Time of Charge Decay : Less than 0.02 seconds
    
    
        Conductivity: black side 50× 103 Ω ± 25%.
    
    
        white side insulative .
    
    
        Resistor: 1.00 × 106 Ω ± 1%.
    
    
        Conductive Ribbon: 9.0 × 103 Ω ± 10%.
    
    
        Total Resistivity of heel grounder circuit: 1 × 106 Ω ± 15%. 
    
 
    
    
        Dimensional and appearance characteristics
    
    
        Conductive Ribbon Tab: Multi-strand, carbon suffused nylon on woven polyester 10mm x 50 cm± 10%.
    
    
        Conductive Rubber Heel Cup:1” x 7”
    
    
        Ankle Adjustment Mechanism: Black Velcro with Elastic Insert
    
    
        Elastic size: 19mm x 10cm + 10%
    
    
        Velcro size: 19mm x 20cm + 10% hook and loop