3 x 11352 (25mm x 54mm) Address Label Rolls (500 Labels per Roll) Compatible with Dymo LabelWriter 310, 320, 330, 330 Turbo, 400, 400 Turbo, 400 Twin Turbo, 400 Duo, 450, 4XL, Seiko SLP Pro, SLP 200, 220, 240, 420, 430, 440, 450