QualityParts From Oregon That you can depend on. Star blade mount: For 36", 38" and 42" ventilated decks; Inner diameter:3/4", shaft length: 7"; Includes Oregon® 45-259 and 45-257 bearings; Use with Oregon® 44-371 or 44-370 pulleys; Fits Oregon® 82-225, 82-220, 82-024 and 82-014; Oregon Equipment Parts 85-017 Spindle Shaft W/ Bearings 7I