* Made of medical grade polystyrene material, high toughness. * Smooth surface and streamlined design to ensure colonies are protected from damage; slim and flexible design for easy access to narrow-mouth containers. * Available in 1μL and 10μL, and the ring is rigorously measured to improve the accuracy of the inoculation capacity. * Gamma disinfection, non-pyrogenic. * Paper-plastic packaging, safe and convenient to use.