High Quality Electric Maize Milling Machine / Maize Posho Mill Prices In Kenya. 6FT-PH represents top grade technology of corn grits machine from our company. Capacity is up to 500kg/hour, it is equivalent of a small corn grits milling line. It can satisfy demand from bigger corn good factories. Nov 14, 2021 1. Economy/small scale posho mill (GM02, GM05, GM10 and GM15) Economy posho mill machine prices in Kenya are the lowest considering the equipment is the smallest. These small posho mills can grind a maximum of three to four (90kg) bags in an hour. The capacity is perfect for a domestic set-up or a business with low traffic.