These Impinj Monza 4QT Adhesive Paper Labels (AZ-U41) are one of many Universal Smart Card designs offering a small RFID UHF antenna design in a range of packaging options. They are suitable for brand protection, supply chain management particularly in retail and garment tagging as well as pharmaceutical and healthcare. 

The AZ-41 tag has an antenna size of 19 x 93mm with an Impinj Monza 4QT Integrated Circuit (IC). This is according to the EPC Gen2 Standard / ISO18000-6C at a frequency between 860-960 MHz. 

The AZ-U41 paper label, not suitable for metal surfaces, is made of a PET base material with strong adhesive and release paper on the back.

See datasheet attached for more information.