purchase of dental materials materials and supplies , intra oral periapical x ray adult film ( specification: size-2 ( 31x41mm ) ekta speed in poly soft packet - 150 films in one packet ) , intra oral periapical x ray pedo film ( specification: size-0 ( 22x35mm ) ekta speed in poly soft packet- 100 films in one packet ) , intra oral occlusal x ray film ( specification: size-4 ( 57x76mm ) ekta speed- 25 films in one packet ) , developer powder 13.5 l ( specification:developer powder to make 13.5 l developer solution ) , fixer powder13.5 l ( specification: fixer powder to make 13.5 l fixer solution )