Custom Design RS 300 Speaker Stands The RS 300 Speaker Stand Ranges are manufactured by the craftsman at Custom Design. The design includes laser precision, hand finished 4mm steel top and base plates combined with zinc plated M8 fixing bolts for total integrity and joint rigidity. Hand polished steel plates connect to an ERW BS EN 10305-3 Steel 76mm tube, reflecting the attention to detail and standards of quality that Custom Design provide to all of their customers. We also manufacturer our world renowed Inert Acoustic Steel and Aluminium products.Custom Design are proud to present the Award Winning RS 300 Speaker Support Stand Range. The RS 300 Speaker Stand Range combine strength with rigidity and the base model of the RS 300 Speaker Support Stand Range. Through design and .