This is a set of 20 authentic gold plated Cartier spring bars with a single shoulder design. These spring bars measure 1.8mm in diameter and are made to fit Cartier watches with 10mm lug widths, commonly found in vintage Cartier models such as the Tank Francaise.
There are photos of your spring bars and the packaging from multiple angles.
If you are not sure if this will fit your watch or if you have any other questions, feel free to email me at Sales@TheWatchLink.co.uk . I'm happy to help!