Chalex Corporation’s precision-made chambered McMaster counting slides are used by researchers, laboratories, nematologists and veterinary practitioners throughout the world. Made of clear durable acrylic* for long-lasting use, our slides also feature exact volumes thanks to injection-molded accuracy which yield consistent test results compared to other slides with handmade chamber spacers.  The quality of these slides make them the standard the world over.

For your convenience, we also offer the Paracount EPG™ Fecal Analysis Kit with McMaster slides, and a selection of Microscopes.

*See the TWO NEW 3-chambered slides that have certain advantages, one with glass cover, one all-polycarbonate

McMaster Counting Slides Green Grid

McMaster Counting Slides – Green Grid

McMaster Counting Slides - Engraved Grid

McMaster Counting Slides – Engraved Grid

McMaster Counting Slides Triple Chamber Design

McMaster Counting Slides Triple Chamber – NEW Design*

Nematode Slides

Nematode Slides


Chalex Corporation

For Mail Only:
P.O. Box 187
Wallowa, OR 97885 USA

Phone: 425-391-1169
Fax: 541-886-3300
E-mail: chalexcorp@att.net