... ), with very low noise level, to be specially usable for Electrical motor of Air conditioner 608 ZZ of high precision level ... ), with very low noise level, to be specially usable for Electrical motor of Air conditioner Product Specifications:· Bearing size: d8*D22 ... low noise level ≤22 dB· To be specially usable for Electrical motor of Air conditioner · Packed carefully in plastic-tube, then ...