You are looking at a PAIR of Holden Sway Stabilizer Bar 18mm -D- Bushes to suit: Holden HQ HJ HX HZ WB "D" bush with 18mm I.D Polyurethane Please double check the O.D of your bar to confirm. Thanks for looking and don't forget to check out all of our Restoration Essentials in our store. Your parcel will have a unique tracking number which will be sent to you via email on dispatch so you can keep an eye on your delivery.