I have used RotoSounds for decades. Tried others, did not like. Won't try new others unless they are given to me. I' m not saying they are the best. They are what I desire. Some guys like red heads others like Blonds. I have always had a hard time getting extra long scale. Last year could not find any anywhere in Austin TX. Ordered from eBay or Amazon. I got RN 66LD Long Scale Standard Scale 45 65 80 105. I was used to always seeing red thread on the ends of the strings. This set had no threads on it at all. Could never get the D string to intonate correctly. No problem w/the last Roto's. The new ones sounded good. Since I bought them online I began wondering if maybe the Chinese were counterfeiting them. (Hey NASA found Chinese counterfeits in the space program) I noticed lately that my fingers are getting black from playing them. RotoSound said stainless steel will do that. RN means nickel. Either they were SS, or the nickel wore off - never had that happen before. Supposedly Guitar Center has the RN 66LD in stock in their Austin Store. RotoSound said they have an exclusive arraignment with Guitar Center and will not distribute to any other stores. Sounds like restraint of trade to me. Good luck getting that addressed in either a Trump or Hillary world. RotoSound has a large variety of Bass Strings now. I wonder what type John Entwhistle used back in the day.