PT195: 0.195” diameter, highly flexible, works best with lower frequency systems up to 900 MHz and lengths up to 25 feet.
PT240: 0.240” diameter, medium flexibility, recommended for 900 MHz systems like RFID, LoRA, and ISM, and lengths of 25-50 feet.
PT400: 0.40” diameter, low flexibility, best for frequencies over 1 GHz and lengths over 50 feet.