5 mm x 19 mm x 6 mm ISB 135 TN9 Self aligning ball bearing

Self aligning ball bearing offers a 44100 lbf, 76900 lbf dynamic load capacity: 5 mm x 19 mm x 6 mm ISB 135 TN9 Self aligning ball bearing selection 5 mm x 19 mm x 6 mm of Genuine Chrome Steel bearing material: Self aligning ball bearing NTN BEARING MANUFACTURING DE MEXICO,S.A.DE C.V. at Wholesale Prices. We are a 5 mm x 19 mm x 6 mm ISB 135 TN9 Self aligning ball bearing Certified Parts Retailer

What is 135 TN9 bearing cross reference？