Buhbo Quality Guarantee Specifications: Label Size: 1 1/7"x 3 1/2" (29mm x 88.9mm) Roll: 400 Individual Labels on 1" core Color: White Compatibility: Brother QL Printers Save time and money with thermal transfer printing your address labels. Without having to buy and replace ink and toner, the individual labels print faster and are easy to peel and stick. The die-cut label size is perfect for mailing address labels, postage, and FBA product stickers. Buhbo thermal labels are packaged individually to limit exposure to light and heat. Extended exposure will cause fading and make text and barcodes unreadable. The quality adhesive sticks well to boxes and envelopes of all material types. (2) Reusable cartridges are included.