1/8 x 3/8 x 5/32? EMQ (Electric Motor Quality) Premium Ceramic Hybrid Bearing with Contactless Metal Shields (MR2zzCEMQ). The EMQ range of Plaig Bearings are a Premium Quality range of Precision Bearings specifically designed for Brushless Motors. Noise reduction & Precise Tolerances along with high quality materials ensure the EMQ range of bearings are fit for purpose. The Ceramic Hybrid Brushless Motor Bearings are designed with Si3N4 Ceramic Balls with Chrome Steel rings / retainer.