HQ POM Plastic PRECISION Glass Ball Bearing 603 to 609 634 636

POM Nylon Plastic PRECISION Ball Bearing Glass Ball Bearings 603 to 609,634,635,636. Bearing outer ring inner ring material : POM. Plastic bearing inner ring, outer ring, both for high strength POM nylon plastic, holder for high performance resin, is in the middle of the glass ball.