Is this the 60mm ring size?
Thanks for reaching out - that's a great question and reminded me that I need to update the website with the diferent ring sizes. This bit is available in both 6cm and 7.5cm ring sizes and actually in a soft or hard mouthpiece. The website change will take a while to implement and so if you wish to order in the meantime feel free to message us at email@example.com and I will send you back an invoice with the exact details.
Please note some of the Beris bits are special order items, and take a couple of weeks to come direct from Beris - once we have the details on what you require we can of course give you a delivery estimate.
Thanks, and hope that makes sense!