D'Addario ECB81M Medium Scale Chromes Flat Wound Electric Bass Strings Regular Light 45-100ECB81M, a medium scale version of D'Addario's best selling Flatwound bass strings, are known for their warm, mellow tone and smooth polished feel. Chromes deliver a deep, rich low bottom end which makes them the flat wound choice of Jazz, R&B and Pop musicians. Fits medium scale basses with a string scale length of up to 34 inches. Medium scale version D'Addario's best selling flatwound bass guitar set Ribbon wound and polished for ultra smooth feel