Based on this product's specifications, here are some alternatives and similar models
Utility blades Proline 5310040, 9 mm cutting width, SK5 steel, pack of 10
Summary description:
Set of Proline 5310040 utility blades with 9 mm cutting width manufactured from SK5 carbon steel. The pack contains 10 replacement blades suitable for utility knives and snap-off holders. Designed for general cutting tasks in workshop, construction and packaging work where a sharp, durable SK5 edge is required. Compatible with standard 9 mm blade holders.