Allflex Maxi FDX Matched Pair Set Layout 5-4, SKU: FDXOTP982/GTXF-COLOR-SET5-4. The ear tag is a printed tag 3" wide x 4" high, 1 Lines of Text on the front panel and with the last 4 digits of EID printed on visual tag as management code. The electronic id tag is FDX. The electronic id number is printed on both the visual tag and the electronic ID tag. The last 4 digits are printed as the management code.