Center Hole Size. You can count on the Oregon®91-620 replacement lawn mower blade to be the best in the industry. It delivers a clean cut for quality results. Requires 2 blades for 32″ cut and 3 blades for 48″ cut. Resists bending, breaking and fracturing. Major brand replacement: SCAG and Lesco. SW-18CVE, SW-18CVE-40000, SW-18CVE-50001, SW-18EKH, SW-18KH, SW-18KH-10000, SW-18KH-1801, SW-20EKH, SW-20KHE-10000, SW32-12B, SW32-13BV, SW32-13KA, SW32-13KA-40000, SW32-13KA-50001, SW32-13KH, SW32-14FS, SW32-15KA, SW32-15KAI, SW32-16FS, SW32-481FS, SW36-12B, SW36-12BS, SW36-13BV, SW36-13K, SW36-13KA, SW36-13KA-10000, SW36-13KH, SW36-13KH-10000, SW36-8J, SW36A-14FS, SW36A-15KH, SW36A-16FS, SW36A-16FS-LE, SW36A-16KAI, SW36A-17KAI, SW36A-481FS, SW48-12B, SW48-13BV, SW48-13K, SW48-13KA, SW48-13KH, SW48-14KA, SW48A-14KA, SW48A-15KA, SW48A-15KH, SW48A-17KA, SW48A-18HN, SW48V-14FS, SW48V-15KA, SW48V-15KH, SW48V-16FS, SW48V-16KAI, SW48V-17KAI, SW48V-481FS, SW52V-15FS, SW52V-17KAI, SW52V-18FS, SW52V-541FS, SWM-52V, SWU48A-17KA, SWU52A-17KA, SWZ-17KA, SWZ-20FS, SWZ-21KAE, SWZ-22FSE, SWZ-600FS, SWZ-651FSE, SWZ36A-16FS, SWZ36A-16FS-LE, SWZ36A-481FS, SWZ48A-17KA, SWZ48A-17KAE, SWZ48A-18HN, SWZ48V-15FS, SWZ48V-17KAI, SWZ48V-17KAIE, SWZ48V-18FS, SWZ48V-18FS-LE, SWZ48V-18HN, SWZ48V-541FS, SWZ52V-17KAI, SWZ52V-18FS, SWZ52V-19KAI, SWZ52V-20FS, SWZ52V-600FS, SWZU48-17KA, SWZU48A-17KA, SWZU48A-18HN.