Replaces Castelgarden 81004365/3. Fits NG460, NG464. Replaces: CASTELGARDEN 81004365/3 Dimensions: LENGTH: 17-5/16" LENGTH: 440 Millimeters WIDTH: 2-1/4" C. H. DIA: 18.0 Millimeters C. H. DIA: 11/16" THICKNESS: 0.1250" OUTSIDE DIAMETER: 5/16" OUTSIDE DIAMETER: 8.5 Millimeters