Fence panels and post's (Norcot RG30)

Hi all, I just moved into new property and I will need useable 8/9 fence panels H 5/6ft X L 6ft and post's 6 or 7ft long 75 X 75mil in size with if anyone have spare one's please can you let me know,. Please note that I have no idea what the measurements means I just wrote what builder send me in message Lol🤔 appreciate, many thanks Salma 🍀