This is a set of of *TWO* pairs of bogies - that is four bogies in total, enough for two carriages.
The 7' 0" (2134mm) wheelbase Commonwealth bogies are used under the longer passenger carriages like the E-3. This set are without the bearing caps which makes them post-1996.
This set of four bogies is available in Smooth Fine Detail and Smoothest Fine Detail plastic and are the most highly detailed South African bogies on offer in HO Scale for 16.5mm track gauge. They include accurate bolster profiles and brake rigging. They require M2 screws for fixing and Atlas 33" wheelsets (#180100).