These Impinj Monza 4QT Self Adhesive Labels (non-metal), model AZ-H4A,  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-H4A tag has an antenna size of 18 x 71.5mm 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-H4A paper label is not suitable for metal surfaces and made of a PET base material, with strong adhesive and release paper on the back.

See datasheet attached for more information.