supply of single row deep groove ball bearing , single row deep groove ball bearing no-6820 make: skf/fag/timken/ ntn/nsk only. speci al conditions : 1) material must be supplied with tamper proof seal; 2) only oem or authorized dealers with valid adc are eligible to quote; 3) the authorized agents shall furnish an inspection certificate issued by th e manufacturer or their authorized testing agency, preferably incorporating the details required for traceabi lity of the products proposed for supply; [ warranty period: 12 months after the date of delivery ] ] , single row deep groove ball bearing no-6821 make: skf/fag/timken/ ntn/nsk only. speci al conditions : 1) material must be supplied with tamper proof seal; 2) only oem or authorized dealers with valid adc are eligible to quote; 3) the authorized agents shall furnish an inspection certificate issued by th e manufacturer or their authorized testing agency, preferably incorporating the details required for traceabi lity of the products proposed for supply; [ warranty period: 18 months after the date of delivery ] ]