I have had the bit for 6 months but my mare has now progressed to a regular snaffle. It's a 5" width or 12.5cm if you prefer metric.
It has a copper roller in the middle with joints either side so nice and flexible in the mouth.
Paid £35.00 for it new.
In good condition and clean.
Happy to post within UK but purchaser to cover cost.
Please contact me if you have any questions.