Screw caps with O-ring (mixed colours) 500 caps

Standard screw caps from different colours with O-ring for leak free sealing of screw cap tubes.

O-rings of these caps are manufactured from autoclavable ethylene-propylene that forms a perfect seal against the rim of each tube. The leak free seal together with the low binding properties of the copolymer makes these caps perfect for almost all long term storage purposes. Colours: Red, Orange, Green, Blue, Yellow, Purple, White and Transparent.