BRAND NEW-NEVER USED OR REMOVED FROM THE PACKAGE. THIS IS THE NSR 34 TOOTH 18.5MM LIGHTWEIGHT 6 HOLE ALUMINUM SIDEWINDER SPUR GEAR FOR 3/32 AXLES. WHEN REPLACING SPUR OR CROWN GEARS IT IS BEST TO REPLACE THE PINION SO THAT BOTH PARTS ARE FROM THE SAME MANUFACTURER RESULTING IN A VERY SMOOTH MESH AND HIGHER PERFORMANCE (IF YOU ALREADY HAVE INSTALLED A NSR PINION THERE IS NO NEED TO REPLACE IT WITH A NEW ONE WHEN CHANGING NSR SPUR GEARS) . THE RECOMMENDED PINION GEARS TO USE WITH THE 613x SERIES OF NSR SPUR GEARS (18.5MM) ARE THE 691x SERIES OF PINIONS WHICH ARE AVAILABLE IN OUR EBAY STORE. NSR USES A .050 SET SCREW TO TIGHTEN THEIR WHEELS AND SPUR GEARS - THE .050 SET SCREW WRENCH FOR THE 4/40 SET SCREWS NSR USES IS AVAILABLE IN OUR EBAY STORE. NSR PARTS ARE HEAVY DUTY AND WERE DEVELOPED FOR HIGH PERFORMANCE AND ENDURANCE USAGE AS WELL AS GIVING A SMOOTH AND PRECISE DRIVE TRAIN. THE PARTS ARE OF THE HIGHEST QUALITY AND BEAUTIFULLY FINISHED. ALL PARTS SHIPPED IN THE UNITED STATES ARE INSURED YOU ONLY PAY SHIPPING FOR THE 1ST PART PURCHASED AND ALL OTHER PARTS HAVE FREE SHIPPING AND YOU CAN EVEN MIX OR MATCH PARTS LIKE TIRES, WHEELS, GEARS AND MORE ................ WILL SHIP WORLDWIDE- WITH A MULTI ITEM SHIPPING DISCOUNT. FREE SHIPPING FOR PARTS WHEN THEY SHIP WITH A LARGER ITEM SUCH AS A CAR OR SET. WE ACCEPT PAYPAL, VISA, MASTERCARD, DISCOVER, AMEX ..................................                                                     MULTI ITEM SHIPPING DISCOUNT OF .00 PER EACH ADDITIONAL ITEM OF SIMILAR SIZE SHIPPING IN THE US.