Rickenbacker standard bass strings, nickel round wound, gauge 45-55-75-105. - Brand: Rickenbacker - Model Number: 95511 - Material: Nickel Round Wound - Gauge: 45-55-75-105 Thank you for viewing. These were purchased from Soundhouse a while ago for a Rickenbacker 4001/4003, but I am now using different strings, so I am selling them. The 2nd and 3rd strings are thinner than a typical string set, and fit perfectly in the 4003 nut. Brand new, unopened. They have been stored in a musical instrument locker at home for about six months and are in their original condition. The strings are, of course, unused, so we cannot accept any claims after use. Please understand this before purchasing. We do not accept price negotiations.