Size: Infant, Color: All Black MDF Instruments MDF777 Features: -Stethoscope. -Constructed from acoustically-superior stainless steel, . -Premier diagnostic instrument with unmatched performance, durability, and aesthetics. -Handcrafted stainless steel dual-head chest piece is precisely machined and hand polished for the highest performance and durability. -Full-rotation acoustic valve stem with green indicator dot allows the user to easily identify the active sound channel and seals in sound. -Fitted with an ultrasensitive diaphragm sealed with a non-chill retaining ring to provide a secure acoustic transmission. -Crowned with a non-chill bell ring, provides greater sound amplification, isolation of low frequencies, and patient comfort. -Constructed of thicker, denser, latex-free PVC, the Y-configuration non-stick acoustic tubing provides insulation for superior sound transmission and seals out ambient noise while preventing the cracking and wearing that can occur from repeated use. .