This is a polyurethane rear shackle bushing set for Austin Healey Sprite and MG Midget using the 1/2 Elliptic rear spring. Set of 8, one kit is needed per car. Polyurethane is resistant to oil, road salt and heat cracking which will give you a long life and on top of that we have made them black so you will not lose any points in a show. Put a set in today and lose than sway in your Austin Healey Sprite or MG Midget. Polyurethane bushes are the best compromise between standard rubber bushes and nylatron for daily driven street cars. They give improved suspension feel with greater wear resistance compared to their rubber equivalents and without the transmission of road noise and vibration suffered when fitting Nylatron style bushings. Another plus of the polyurethane bushings is that they are naturally self lubricating.