Glass Veterinary Thermometer with Stretch Cord and Tail Clip for Horses and Large Animals. Stretches to 14 Inches. Dual Scale, °F /°C. CONTAINS NO MERCURY: Our Mercury-Free Veterinary Thermometer with Stretch Lanyard and Tail Clip is filled with eco-friendly mercury-free gallium. The thermometer is safe for the environment and safe for use around humans, pets and livestock. For veterinary use only. EASY TO USE & READ: The 5-inch long, oval shape is comfortable to hold. The large-digit scale with black numbers on bright, white background is easy to read. Backside has a handy reference chart with normal temperatures for a variety of animals. FAST & ACCURATE: The Mercury-Free Veterinary Thermometer with Stretch Lanyard and Tail Clip shakes down quickly and provides accurate rectal temps (+/- 0.1 °F) in seconds. Dual scale. Accurate readings from 97F to 110F (35C to 43C). EASY CLEAN-UP & STORAGE: Smooth, waterproof surfaces make for easy cleaning and disinfecting. Hard, plastic case protects thermometer during transport and storage. IN THE BOX: One mercury-free veterinary thermometer, coil stretch lanyard and tail clip, hard plastic storage case.