Reversible Combination Ingot Moulds 4 Hole 80 High from Durston Tools. Durston Tools’ Reversible Combination Ingot Moulds. Provide adjustable moulding in six sizes of wire. They are precision ground and are adjustable up to 70mm wide by 80mm long. This is the four hole 80mm long version which can give wire diameters 4, 5, 6 and 7mm.