Angelus Rockabilly Nickel Wound Contrabass String Set (1-G, 2-D, 3-A, 4-E). - Brand: Angelus - Model Name: Rockabilly - String Type: Nickel Wound - Sizes: 1-G, 2-D, 3-A, 4-E I bought these last July. I put them on briefly while trying out different strings, but took them off because they weren't to my liking. I don't think there are any particular problems, but since they are used, please understand that they are non-refundable and non-returnable.