Compatible with Case IH Tillage(s) RMX340, 340, 475, 496, 3800, 3850, 3900, 3950, 4400, 4450. Replaces Case IH OEM nos 139918C1. Fits 1-1/2″ Round Axle With 9″ Spacing Our eBay Store About Us Contact Us Add to Favorite Sellers 9″ Disc Harrow Full Bearing Spool Spacer Fits 1-1/2″ Round Disc Axles 49.95 Compatible with Case IH Tillage(s) RMX340, 340, 475, 496, 3800, 3850, 3900, 3950, 4400, 4450. Replaces Case IH OEM nos 139918C1. Fits 1-1/2″ Round Axle With 9″ Spacing.