DR Handmade Strings BKB6-30 6 Electric Bass Guitar Strings Medium - 30-125American made DR Extra Life Black Beauties Coated Bass Guitar strings are made to last longer so you can rock on. DR coats these strings with a proprietary coating before the winding process to provide extra protection. Coated strings last longer than traditional non coated strings because they protect the metal from corroding due to perspiration, oils from your fingers and other contaminants that can find their way inside the windings and dull the