** Shares of dialysis products maker Rockwell Medical RMTI.O rise 7.7% to 93 cents premarket
** Co says it has extended its product purchase agreement with one of the largest dialysis providers in the United States through December 2026
** Prices for dialysis products will increase under amended agreement - RMTI
** Co develops and distributes products for end-stage kidney disease treatment
** Products used in dialysis centers, hospitals, nursing facilities and homes - Co
** As of last close, stock up ~4% over the past 1 year
(Reporting by Sahil Pandey in Bengaluru)
((Sahil.Pandey@thomsonreuters.com))