Blickle bhbk spo pressed steel heavy duty fixed castorswheels 75 200mm blickle 7138 this bh spo 175k heavy duty fixed castor and wheel from blickle features a oslash 175mm wheel with pressed steel castor and top plate fitting equipped with a bolted wheel axle which is zinc plated blue passivated and cr6 free the natural white wheel features a rugged tyre and running tread which has been manufactured with high quality impact resistant nylon offering a very low rolling and swivell