"Chanda" Sweet half moon brass tunnel :

Material : Golden brass, nickel and lacquer free
How to clean brass : Clean the brass jewel with soapy water, rinse, then dry and polish with a microfibre cloth for a better result.

Sold by piece / Non unscrewable / Different sizes available !

Be careful, edges are huge
Take a size smaller to be sure to be able to put it without forcing !
Ex : If you're stretched in 8mm, take size 6mm;etc...