Ubbelohde viscometer 3-30mm²/s calibrated

Ubbelohde viscometer, DIN type with printed constant according to ISO/DIN 3105, DIN 51502, BS 188, KFT 60-100, No. Ic, inner Ø 0.84 mm, K 0.03, measuring range 3-30 mm²/s, calibrated, four-legged