When attached to the screw cap microtube, the tether rotates freely for easy opening and closing of the cap. Tethered caps can be easily removed from the tubes if desired.

Caps are manufactured of ultragrade polypropylene and are available with or without an O ring. O rings are made of autoclavable ethylene/propylene and form a positive seal with the rim of our tubes, the best insurance against leakage.

Tubes and caps are manufactured of polypropylene and can withstand centrifugation (17,000 x G). They are also suitable for vapour-phase liquid nitrogen storage, boiling and autoclaving. (Refer to Section 6 for recommended autoclaving instructions.)

* All tubes and caps feature a frosted writing area for easy identification.

* Tether caps are available in a variety of colours for quick colour coding.

* External ribs on tubes position and lock them into place in racks with serrated holes, allowing single-handed opening and closing.

* Conical bottom allows for more complete sample retrieval.

* Available in amber for "Light Sensitive" samples.

Connected Tubes and Caps - To save researchers and technicians valuable time and effort, caps are connected, but not screwed onto the tube, allowing quick access and ease of use. Unit package is 500 tubes with connected caps in one bag.

Non-Connected Tubes and Caps - Unit package is 500 tubes and a packet of tether caps in one bag.

Sterilized Tubes - Tether caps are attached and screwed onto the tubes. 50 tubes with caps per bag/10 bags per unit. Sterilized by Gamma-Cobalt 60 Irradiation.

Note: Connected, Non-Connected and Sterilized versions come with Natural Coloured Caps. Substitutions can be made upon special request. Please call for details.