You are looking at a pair of Holden Universal Joint U Bolt +Nut kit to suit; HK 6 CYLINDER 4 SPEED H/DUTY. HK 307 AUTO REGULAR DIFF HG HT V8 REGULAR DIFF HQ HJ HX HZ WB 6 CYLINDER WITH SALISBURY DIFF HQ HJ HX HZ WB V8 EXCEPT 1 TONNER TORANA LH LX V8 Specs: Total Length = 60.32mm. Width (bolt centres) 30.82mm. Thanks for looking and don't forget to check out all of our Restoration Essentials in our store. All postal deliveries are sent via Aust Post eParcel. 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.