Sterile, cotton-plugged, individually wrapped Individually wrapped in resealable plastic bags Borosilicate glass Tolerances: 1/2 mL pipet,± 0.013 mL ; 1 mL pipet, ±0.02 mL ; 5 mL pipet, ± 0.15 mL ; 10 mL pipet, ±0.3 7536T48 pipets have black markings: remaining sizes have blue markings.