We are offering flow cup viscometer. This type of cup has been in popular use for many years and conforms to is 3944 1965 specification. These are available in following sizes: jet no.b-1,b-2,b-3 &b-6 flow cup viscometer deep for 4 viscometer with ddigital temp. Indicator & controller. spare brass cup with any size jet deep for 6 viscometer with digital temp. Indicator & controller.