THESE ARE NEW REPLACEMENT PARTS NOT STRIPPED FROM A DEFECTIVE UNIT. THE BALL BEARINGS NEVER WEAR OUT BUT CAN FALL OUT. NICE TO HAVE IN CASE THEY ARE NEEDEDCHECK OUT WHAT OUR CUSTOMERS SAY& THE NINE POSITIVE 5 STAR REVIEWS ABOVEDUAL PART # 216-845 RUBBER SLEEVE & TWO BALL BEARINGS PART # 211-718. THESE ARE USED ON UNITS THAT HAVE A SHIFT KNOB AT THE BASE OF THE ARM FOR SINGLE OR MULTI. USED ON THE POPULAR MODELS 1219, 1229, 1229Q & THE 1249 PHOTO#4 SHOWS THE LOCATION ON MOST DUALS. THE RUBBER SLEEVE DRYS OUT & CRACKS. (PHOTO 5) WHEN CRACKED IT NO LONGER APPLIES TENSION TO THE TWO BALL BEARINGS & THE ARM DOESNT LOCATE PROPERLY VERTICALLY THE ARM WILL THEN BIND (SKIP) WHEN TRACKING A RECORD OR BIND & WONT MOVE ON TO OR OFF THE RECORD. VERY OFTEN YOU THINK IT IS THE GUIDE OR OTHER PARTS --IT IS USUALLY THE SLEEVE. THE BALL BEARINGS DONT GO BAD BUT CAN BE MISSING OR LOST WHEN REPLACING THE SLEEVE. PLEASE NOTE-- YOU MUST BE HAPPY OR RETURN IN 30 DAYS FOR A REFUND LESS SHIPPING ! See our other auctions for vintage audio and hard to find turntable/speaker parts. Thanks again for looking and happy bidding! BID WITH CONFIDENCE Check our feedback We know how to pack & ship 36 years repairing/restoring turntables The turntableexperts Track Page Views With Auctivas FREE Counter