Eureka Atom Specialty 75mm Steel Burr Set OEM carbon steel burr set for Eureka's 75mm grinder platform, shared across the Atom Specialty 75, Drogheria 75, Helios-75, and Olympus 75 lines. SPECIFICATIONS Outside diameter: 74 mm Internal diameter: 38 mm Thickness: 9 mm 3 mounting holes Material: carbon steel COMPATIBILITY Fits: Atom Specialty 75, Drogheria 75, Helios-75 (202111- ), Olympus 75 HS E, Olympus 75 NEO, Olympus-75-E-HS (202102- ), Olympus 75 HS A, Olympus-75-A-HS (202011- ) Replaces: Eureka part #S15080002 INSTALLATION Moderate difficulty, grinder disassembly required; a qualified technician is recommended if you haven't changed burrs before. PRO TIPS These are carbon steel burrs, not ceramic, they cut faster and stay sharper longer but are more prone to rust if left in a humid hopper. Wipe them dry if the grinder will sit unused for an extended period. See our grinder burr maintenance guide for when to replace burrs and how to change them.