Half Spool, 2-3/8" Depth, Fits 1-3/4" Round Axle, for Sunflower Discs with 7-1/2" or 8-1/2" spacing. Fits models, 1130, 1211, 1212, 1231, 1232, 1233, 1234, 1321, 1331, 1431, 1432, 1433, 1434, 1435, 1441, 1442, 1443, 1444, 1541, 1543, 1544, 1550, 6630, 6631. Fits Sunflower Land Finishers with riveted flange bearings. Replaces OEM# SN2816