Feature Watch balance wheel mainspring mount/holder Material: NBR(Nitrite Butadiene Rubber) Holder diameter is around 30mm Color: green Waterproof and dustproof Weight: around 15.8g Manual measurement may have a 1-3mm error
China made watch repair tool We only sell brand new products.
Package included: 1X holder
the balance wheel in the picture is not included and just for the display.