Here's what other sites are saying:
Avalanche professionals, serious ski tourists and Avy Level II and above students will need the durable BCA Aluminum Crystal Card as part of their ongoing study of the snowpack.
Gear up for focused snow study with the Backcountry Access Aluminum Crystal Card. This essential snow study tool is required equipment for level two and three avalanche courses. The one-, two- and three-mm grids help you to gauge snow crystal size, and the crystal icons offer quick reference for writing up detailed snowpit profiles.
- Altrec Outlet
Backcountry Access's Crystal Card is a basic snow safety tool that will help you in making an informed decision about the snowpack you're about to attack. An aluminum card with printed information on basic snow crystal types, it's easy to carry in a pocket and reference on moment's notice.
- Mountain Gear
The Backcountry Access Aluminum Crystal Card helps you make an informed decision about the current snowpack conditions when you're skiing in the backcountry. BCA printed this card with one-, two-, and three-millimeter grids as well as a cheat sheet for analyzing snow crystal types and sizes. The small aluminum card slides easily into your pocket or snow study kit.
Where to Buy
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Backcountry Access Lexan Crystal Card
Backcountry Access Ruler
Swix Snow Thermometer with Case
Backcountry Access Slope Meter
$22 - $25
Brooks-Range Folding Magnifier X10
Backcountry Access Digital Thermometer