A pair of brand new unbranded steel BMX axle extenders in black smooth finish with anti spin adapters to fit both 10mm and 14mm axles by bolting on with your axle nut. They are 4 1/4" long, 1 1/2" diameter and weigh 640 grams per pair. For use on BMX bikes or even cruiser bikes for tricks or just standing room for a passenger. We have bought up a job lot of these so we have the volume and are able to offer this great price.