Lotus Connect Store › Eisco Labs Rubber Pippette Bulb - 5ml Eisco Labs Rubber Pippette Bulb - 5ml $1.19 Rubber Pipette Bulb5mm hole for pipette5ml red bulbRubber Pipette Bulb. Can be used for a replacement when your old pipette bulbs crack or wear out. 5mm hole for pipette. Quantity: Add To Cart Added! Rubber Pipette Bulb5mm hole for pipette5ml red bulbRubber Pipette Bulb. Can be used for a replacement when your old pipette bulbs crack or wear out. 5mm hole for pipette.