Designed to connect test tubes of different sizes this unit will connect 12,15,16, and 20mm test tubes for Colony transfer for any of the following situations:
Transferring from a dirty to clean Test Tube
Transferring into an Ant Farm or outworld connection.
These are often used with out outworld nest connectors and these can be screwed onto any outworld for colony transfers.
FREE postage when purchased with an item that has postage on it.
New Flexible Delux Model.
these are a more rubbery consistency with give and are a great product.