Manufacturer #: R303. These Original-Manufacturer Oliver brand bread-slicer blades (model R303) come in a set of 32 blades (blades cannot be purchased separately). The length of these blades, pin to pin, is 10.25"; the width is 3/8". These blades fit Oliver models as follows: 42-A, 26-A, 28-A, 709, 711, 732, 727G, 737G, 777, 797, 758-N, 937 ...