Each certified probe kit includes 75 probes and 75 matched, nickel-plated power loads. Silver probe kit is for natural stone or coarse aggregate (density greate
Each certified probe kit includes 75 probes and 75 matched, nickel-plated power loads. Silver probe kit is for natural stone or coarse aggregate (density greater than 125 lbs/cu ft). Gold probe kit is for lightweight aggregate (less than 125 lbs/cu ft density) Cannot be shipped via air or ocean.