Welch Allyn Tycos DuraShock™ Hand Held Aneroid (DS58-11). Gear-free DuraShock™ technology, you can count on the DS58 aneroid to remain in calibration longer than traditional aneroids, providing more accurate readings over time and a lower lifetime cost, helping to improve practice efficiencies.
Features:
- Gear-free DuraShock™ technology 
 - Certified accuracy to ± 3 mmHg 
 - Laser-engraved dial face for accuracy 
 - Jeweled movement for long life 
 - Lifetime calibration warranty 
 - Latex-free for safety 
 - Thumbscrew bleed valve and ergonomic inflation bulb 
 - Unsurpassed reliability in a traditional, handheld design 
 - Designed to enhance comfort 
 - Withstands a 60" drop, exceeds AAMI's shock resistant requirement