Ubbelohde viscometer 5-50mm²/s calibrated

Ubbelohde viscometer, DIN type with printed constant according to ISO/DIN 3105, DIN 51502, BS 188, KFT 60-100, No. Ia, inner Ø 0.95 mm, K 0.05, measuring range 5-50 mm²/s, calibrated, four-legged