Grinding is quite a dramatic activitiy - crushing egg shells to add to the compost feels & sounds exciting, grinding seeds & spices into spice blends or leaves & petals into herbal teas releases wonderful aromas and provides sensory feed-back. This wonderful little pestle & mortar set is made from cast iron - the weight of the pestle helps with the grinding & the weight of the mortar means it won't move around too much. Dimensions (cm): 8(h) x 5 (dia)