*Made of polypropylene
*Tubes with ribs lock in place when engaged in serrated holes. For details on OneHand™ Microtube Rack.
These new tubes have molded ridges matching serrations on racks such as the Simport T360 OneHand™ Microtube Rack on page 121, thus allowing the removal of caps with one hand. All Simport® Micrewtube® closures (below and on page 120) can be used on these tubes. Made of polypropylene.