Drummond Sequencing Pipette is used for loading gel sample slots 0.4 mm or larger (0.2 mm with optional tips). Use with disposable, flexible, autoclavable, precision tapered polycarbonate tips (3-000-203-G and 3-000-203-G/.2). Includes 6 tips (outer diameter 0.34 mm), two replacement O-rings, and one plastic spacer.