Spore coupons for Hydrogen Peroxide to be used with the Helix test - Stainless steel coupon of 38.50 mm x 6.0 mm x 0.8 mm - 106 Geobacillusstearothermophilus ATCC 7953 spores per coupon. Upon completion of the sterilization cycle, the spore coupon should be incubated in a suitable culture medium at 60 ºC. We suggest the use of BIONOVA® MC20 or MC1020 culture media to final readout at 24 hours.