Membrane Solutions Water Filter Straw w/ Case Blue. 400mL max flow rate. Pore size: 0.1 micron. Filters 99.999percent protozoan parasite micro-plastic bacteria. 4 stage design also filters large particles residual particles Chlorine harmful chemicals. Improves odor and taste. Includes carabiner attachment clip. Black nylon zippered storage case. Specifications for Membrane Solutions Blue Water Filter Straw w/ Case: Manufacturer: Membrane Solutions Pore Size: 0.1 microns Color: Blue Package Contents: Membrane Solutions Blue Water Filter Straw w/ Case Membrane Solutions OESF005Z: Water Filter Straw w/ Case Blue