EPB-365R Teller double bass endpin DBW-10125 Boston solid rubber double bass wheel EPB-360 Teller double bass endpin EPB-360E Teller double bass endpin EPB-362E Teller double bass endpin EPB-362EG Teller double bass endpin EPB-342 Weidler double bass endpin EPB-343 Weidler double bass endpin EPB-442 Weidler double bass endpin EPB-500 ELS double bass endpin