3 part syringes have a latex-free piston with two seal rings. A light lubrication of a silicone based medical lubricant allows for a safe regular sliding motion of the piston. Features: 1ml has ultra accurage 1/100th graduations and Zero Dead Space, black graduation gives ideal contrast and readability. High barrel transparency simplifies inspection of syringe's content. Very firm stop restraint minimizes risk of accidental plunger withdrawal. Smooth gliding characteristics are excellent for oil/alcohol based injectables. Non-toxic, latex and pyrogen free.