Ventilated Test Tube Transfer Joiner

$1.50$4.00

For joining two test tubes together to allow movement of ants and brood into a clean test tube. Units for joining 16mm to 16 mm, 16 mm to 20 mm and 20 mm to 20 mm. Ventilation holes in the centre allow air flow whilst tubes are connected. Can be purchased individually or as a set of 3.

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per unit, per 3 units

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