This two-part borosilicate glass tube has a ball in the lower end which acts as a check valve to prevent sample loss during transfer. Both parts are pre-scored, allowing the unit to be easily snapped apart for safe disposal. Each part also comes wrapped in corrugated paper. Approx. Capacity: 200mL. Approx. Length: 42in. Approx. O.D.: 22mm. Kimble® #: 76100-200.