Buying Glass Capillaries for Making Micropipettes and Microelectrodes

WPI offers a wide spectrum of high-quality glass capillaries. We take pride in our ability to ship your glass order within 48 hours. If you need a special glass that does not appear in our catalog, please call us. We will make every effort to provide it for you.Firepolish

Fire-Polished glass capillaries are easier to insert into microelectrode holders without damaging the gasket. More importantly, fire-polished glass won’t scratch the chloridized wire used in a recording electrode. Fire-polishing does not affect the glass’s mechanical or electrical properties.

Capillaries

Borosilicate glass capillaries: Close dimensional tolerances assure microelectrode uniformity and reproducibility. Available in one-, two-, three-, five- and seven-barrel configurations, a complete range of single barrel thin-wall sizes, and a variety of special configurations. Capillaries with filaments contain a solid filament fused to the inner wall, which speeds filling of electrodes. Capillaries with or without inner filaments are available for making microelectrodes in a wide range of diameters.

Single Barrel standard wall thickness capillaries are offered either with or without inner filaments for quick filling in a variety of lengths and diameters. Two usable electrodes can be made from one 6-inch length. Borosilicate glass is either Corning 7740 or N51A, depending on the part number. Contact WPI Technical Support for specifications for your part number.

Thin Wall single barrel capillaries are offered both with or without inner filaments. The concentricity of this material provides excellent strength. Micropipettes made from thin wall capillaries have fine tips with a short taper.

NOTE: Because electrode tips erode when left filled with saline solutions for long periods, electrodes should be made and filled immediately prior to use.

Single-Barrel Standard Borosilicate Glass Tubing

Order code Length OD (mm) ID (mm) Filament Fire Polish Qty
1B100F-3  3 in. (76mm) 1.0 0.58   500
1B100-3   3 in. (76mm) 1.0 0.58     500
1B120F-3   3 in. (76mm) 1.2 0.68   350
1B120-3   3 in. (76mm) 1.2 0.68     350
1B150F-3   3 in. (76mm) 1.5 0.84   225
1B150-3   3 in. (76mm) 1.5 0.84   300
1B100F-4   4 in. (100mm) 1.0 0.58 500
1B100-4   4 in. (100mm) 1.0 0.58   500
1B120F-4   4 in. (100mm) 1.2 0.68 400
1B120-4   4 in. (100mm) 1.2 0.68     350
1B150F-4   4 in. (100mm) 1.5 0.84 300
1B150-4   4 in. (100mm) 1.5 0.84   300
1B200F-4   4 in. (100mm) 2.0 1.12   125
1B200-4   4 in. (100mm) 2.0 1.12   200
1B100F-6   6 in. (152mm) 1.0 0.58   500
1B100-6   6 in. (152mm) 1.0 0.58     500
1B120F-6   6 in. (152mm) 1.2 0.68   350
1B120-6   6 in. (152mm) 1.2 0.68     350
1B150F-6   6 in. (152mm) 1.5 0.84   225
1B150-6   6 in. (152mm) 1.5 0.84     225
1B200F-6   6 in. (152mm) 2.0 1.12   125
1B200-6   6 in. (152mm) 2.0 1.12     125

Thin-Wall Single-Barrel Standard Borosilicate (Schott Duran) Glass Tubing

Order code OD (mm) ID (mm) Filament Fire Polish Length Qty
TW100F-3 1.0 0.75   3 in. (76mm) 500
TW100-3   1.0 0.75     3 in. (76mm) 500
TW120F-3   1.2 0.90 3 in. (76mm) 400
TW120-3   1.2 0.90     3 in. (76mm) 350
TW150F-3   1.5 1.12   3 in. (76mm) 225
TW150-3   1.5 1.12   3 in. (76mm) 300
TW100F-4   1.0 0.75   4 in. (100mm) 500
TW100-4   1.0 0.75   4 in. (100mm) 500
TW120F-4   1.2 0.90   4 in. (100mm) 350
TW120-4   1.2 0.90     4 in. (100mm) 350
TW150F-4   1.5 1.12   4 in. (100mm) 225
TW150-4   1.5 1.12   4 in. (100mm) 300
TW100F-6   1.0 0.75   6 in. (152mm) 500
TW100-6   1.0 0.75   6 in. (152mm) 500
TW120F-6   1.2 0.90 6 in. (152mm) 400
TW120-6   1.2 0.90     6 in. (152mm) 350
TW150F-6   1.5 1.12   6 in. (152mm) 225
TW150-6   1.5 1.12   6 in. (152mm) 300

 

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