This set of 2 stainless steel watch spring bars will fit all Cartier Ballon Bleu 42mm watches with model numbers 3765, 3941, and 3001. These bars are used to attach the strap to the watch case.
These were not made by Cartier but are high quality compatible parts made to fit Ballon Bleu 42mm watches.
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!