Tube Cappers & Closures for Blood Drawing and Test Tubes

Cappers — snap-on tube closures — reseal evacuated blood drawing tubes and disposable test tubes after collection, transport, or storage. In a busy phlebotomy lab, they're the small detail that prevents spills, aerosols, and cross-contamination when specimens move between draw station, centrifuge, and refrigerator. Our collection features Globe Scientific closures in polyethylene, designed to fit the standard tube diameters technicians work with every day.

The two questions that matter most when ordering are tube size and color coding. Get the diameter wrong and the cap won't seat; get it right and the double-tab snap design gives you a secure, one-hand press-on fit with tabs that make removal quick and clean. For 16 mm glass evacuated blood drawing tubes and 16 mm glass test tubes, the Globe Scientific 113141C closures in natural are the correct match. For the narrower 13 mm glass evacuated tubes and 12 mm plastic test tubes, Globe Scientific offers the same double-tab snap closure in both natural (113140C) and green (113140G) — the green useful for visually flagging tube groups, batches, or patient sets during processing.

All of these closures are non-sterile, which suits general specimen handling, recapping, and storage rather than sterile-field applications. Because they're molded from flexible polyethylene, they resist cracking and grip the tube rim reliably through temperature swings in refrigerated storage. Buying by tube diameter rather than tube brand keeps ordering simple: measure the outer rim, match the millimeter, and choose the color that fits your labeling workflow.

Cappers are a low-cost, high-frequency consumable, so stocking the right sizes in advance keeps collection and lab work moving without interruption.