This product is for the vial only, the comparator in the picture is available with the humus test kit.
Customer Reviews:
Eduardo Dubuc (Wednesday, 17 November 2010) Rating: We are in a compost plant (14Ton/day) project and we need design de laboratoty facilities. żMay you give a list with the equipment that is necesary to have into the lab ? Quantity, unit price and minimun especification for a purchase order.rnEduardo Dubuc (Project Eng.)rnCaracas Venezuela
Humus Testing 
