Transparent. Sealing caps have a slight taper and offer a very secure hold and are comfortable to use.
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers
Caps for test tubes
Test tubes stoppers