Life-Link Snow Crystal Card
Here's what other sites are saying:
An opaque, waterproof plastic 3" x 5" card with 1 & 2mm grids and examples of ten basic snow crystal types. On the back are a few useful hints concerning avalanche forecasting.
- Vargo Outdoors
Life-Link Snow Crystal Card is the perfect pocket reference for studying snow crystals and determining snowpack quality. Plastic 3.5 x 5 in. field card. Grain type symbols and magnifying grid for field observation and notes. Hardness Scale. Test Pit check sheet. centimeter and inches scale. Temperature conversion. Keep it in your pack for easy avalanche reference
- Tahoe Mountain Sports