Used for sampling aggregates, ores, refractory materials, pigments, powdered coal, soap, cement, etc. It consists of a sheet metal box mounted on legs and fitted with a series of chutes of equal width which discharge the material alternatively in opposite directions into separate pans. The chutes of the riffle are steep enough to allow rapid flowing of the material. It has 14 chutes of 13mm width and is complete with receivers.Also available with 16 chutes of 25mm width, complete with two receivers.