This is a set of of *TWO* pairs of bogies - that is four bogies in total, enough for two wagons.
The HS MkVII bogie is a self-steering bogie developed in South Africa for operating at higher speeds than Barber type roller bearing bogies. As well as being used extensively by South African Railways (Spoornet), it has proved to be a very successful export.
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).