Malcolm Johnston, Kathy Kaptein,
and Marvin Kaptein
M-K Industries
M-K Industries was started in 1975 by Marvin and Kathy Kaptein when they started building custom designed Hoppercones. The company relocated to northwest Iowa in 2007. M-K Industries is now located in the industrial park in Rock Valley, Iowa.
M-K Industries is a family-owned company where each cone is designed by Marvin and custom built to the unique and exact needs of the customer.
Each Hoppercone carries with it over 25 years of experience in design and manufacturing. Marvin and Kathy are proud to provide a quality product that helps farm operators save time and money while protecting their health and safety.
