17 mm x 30 mm x 14 mm ISO GE 017 ECR plain bearings

17x30x14 Bearing offers a SKF Wheel Bearings DEVELOP MFG.CORP. 17 mm x 30 mm x 14 mm ISO GE 017 ECR plain bearings selection of Genuine 17x30x14 Bearing at Wholesale Prices. Contact with Flinger seal type: We are 17 mm x 30 mm x 14 mm a 17 mm x 30 mm x 14 mm ISO GE 017 ECR plain bearings Certified Parts Retailer

What is GE 017 ECR bearing interchange？