A convenient, economical closure for use with the KIM-RAK™ or other disposable culture tubes. Contents are maintained sterile without the need for cotton plugging. KIM-KAPs can be removed and replaced without contamination of the contents. Sizes available for and reusable culture tubes and disposable culture tubes. A 38 mm KIM-KAP is available for use with Baffled Shake Flasks. Colored KIM-KAPs are now also available. Choose from red, green, yellow, blue, or natural.