Exotek RB6/RT6 Titanium Rear Quick Change Shock Posts are machined from lightweight Ti 6-4 titanium for durability, with each post weighing in at just 1.4 grams. Posts are compatible with the Ultima RB6/RB6.6, RT6 and SC6 models and are longer so you can add or remove stock spacers as needed. Package includes two shock posts and two M3 locknuts.