Rocker’s Magnetic Lab Filter Holder Makes Your Job Easier

Many of our customers are running multiple tests simultaneously. Their bench tops are covered in manifolds, tubing, flasks, and a pump; space is limited. Test results need to be recorded. Membranes need to be changed. Funnels need to be refilled with solution. Time to repeat.

Rocker’s magnetic filter holder is a simple but work-changing innovation. Its single hand operation allows quick, accurate changeovers without tying up both hands.

Designed for maximum compatibility

The Rocker MF and MF Pro Series magnetic filter holders are built to make work in your lab easier. It couldn’t do that if it was only designed to work with other Rocker products.

It works almost universally with bottles and vacuum flasks, with or without side arms.

It has a membrane guide to help position your filtration membranes easily, and forceps access points so you can remove your forceps without dragging the filter out of place, and you can easily remove the filter after use.

It forms a strong magnetic seal so you don’t need two hands to place your funnel once the filter is in place.

It’s high temperature resistance means it withstands repeated autoclave cycles.

And it comes in either polyphenylsulfone (PPSU) or polyethersulfone (PES).

Why PPSU and PES?

PPSU and PES are thermoplastics. They maintain stiffness and dimensional stability when used at very high temperatures.

This makes these two materials widely useful across filtration applications, but each come with characteristics that make it particularly suited for a handful of applications.

  • PES is well suited to applications in contact with non-polar media, such as fats and oils, as well as under oxidative conditions. It maintains its stability through about 200 sterilization cycles in hot water or superheated steam.
  • PPSU is best suited for applications with superheated steam (134 °C), which is a common condition of sterilization, as well as in the presence of aggressive detergents. It has been shown to resist crack formation in excess of 2,000 sterilization cycles.


The Rocker MF Series comes standard in PES or Pro in PPSU. Need a full filtration kit or have questions about your application?