Taper Core Stainless Steel Bass Strings wound on a Hex Core. Contemporary bass players, as well as bass makers, who demand a taper core string to enable modern bass playing techniques, will be delighted by the superior performance Taper Core bass strings deliver. Todayâ€TMs 4, 5 and 6 string bass players searching for increased stability in the lower registers will find great clarity and definition with DRâ€TMs tapered bass strings. DR Taper Cores use a single wrap around the core as the narrow winding passes over the bridge. Available Gauges TMR-45 - 45, 65, 85, 105. TER-50 - 50, 70, 90, 110.TLR-40 - 40, 60, 80, 100.