The TUNAIR™ two piece cap assemblies are constructed of polypropylene and are resistant to most solvents. All flasks and caps are fully autoclavable prior to reuse and filter linings can also be autoclaved or simply replaced.
The silicone filters are 0.22 micron and will last indefinitely unless punctured. The silicone filters do not need to be washed, but can be rinsed with water if visibly soiled. It is recommended to always leave the filter in the cap and autoclave.
The Dri-Gauze filter is 0.22 micron and constructed of nitrocellulose. Each filter can be used 10 – 12 times. The Dri-Gauze filters can be autoclaved in the cap.