Super Sensitive's Double Bass D Strings have been a favorite as an affordable steel string with good tone and excellent response. The double bass D strings are made of solid steel with nickel winding. Made with student players in mind, Super Sensitive bass strings have been a recommended choice by Suzuki Method instructors, school music teachers and players alike. With a responsive bright and powerful tone, Super Sensitive strings are resistant to temperature or humidity changes making them a very stable string choice. Available in full to fractional sizes to meet players needs at any level.