65-L0010/A Three gang mould for 40x40x160 mm prisms. Minimum hardness HV200
65-L0010/B Heavy duty three gang mould for 40x40x160 mm prisms. Minimum hardness HV400
They are identical in shape but the Heavy duty 65-L0010/B model has a minimum hardness of HV400 and the surface is specially protected by a rust inhibitor treatment.