it destroys them instantly

5 Year Limited Manufacturer Warranty

Step-by-step instructions include full-color photos plus rationales explaining why and how to use specific techniques

Unit Dose (100 Packets per Box

Acrylic cradle (only) for use with the ADC Adtemp 429 Non-Contact Thermometer

20 ft: Wall Mount Eye Test Chart - Snellen Housebrand it destroys them instantly(22" x 11") Snellen chart tests for visual acuity with the familiar letters that progressively get smaller down the chart and is designed for testing at 20 feet. These plastic, non reflecting charts feature a brass eyelet for wall mounting. Charts are designed for 20 foot vision screening.