Roller with rubber for chain ​​return

Internal part is made of black polyamide, external rubber is made of grey thermoplastic rubber 65 Shore;bearing made of chrome steel.
To be assembled in the chain return.
This roller is completely closed, total lack of internal cavities to obtain the maximum level of cleanability and noiselessness during working operations.
On request and for a MOQ, rollers with special bores and other colours.