R188 Full Si3N4 Ceramic Bearing 1/4" x 1/2" x 3/16" Ball Bearing

描述

1、R188 Full Si3N4 Ceramic Bearing. 2、Better than Full ZrO2 bearings. 3、Can be applied to high speed, high temperature, low temperature, strong corrosion, strong magnetic field, vacuum and high pressure such as all kinds of bad working condition.