• Simple and safe: prevents injuries when opening ampoules with your hands. • Reusable and easy to clean: the O-ring can be replaced if lost or broken. • Lightweight: perfect for hanging from a lanyard or carrying in a pocket. • Compatible with ampoules from 1 ml to 15 ml (guide only). • Includes instructions (Spanish language not guaranteed). • Product dimensions: 1.9 cm wide, 1.9 cm high, and 8.2 cm long. • Product weight: 0.001 kg.