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Hazard Monitoring
Grain Temperature Systems
Grain Management

Grain Cables and Leadwire are manufactured in the USA. The Rolfes @ Boone manufacturing facility is located in Boone, Iowa. The highest quality cable available is manufactured to meet your needs. 

Grain Cables/Leadwire
Read Grain Temperatures
DigiGrain Automatic Grain Management
Wireless Grain Temp

Carver Company "Striking Good Products, Striking Good Prices"