Freudenberg H23 is a flexible and easy to use base carbon paper Gas Diffusion Layer (GDL) without a Microporous Layer (MPL) and without a hydrophobic treatment. It is 210 um (microns) thick.

Freudenberg H23 is formerly known as H2315.

Freudenberg Carbon Paper GDL Properties Sheet

Freudenberg Fuel Cell and Electrolyzer Carbon Paper GDLs SDS

Gas Diffusion Layer Properties
Material Type	Carbon Fiber Paper
Thickness	0.210 mm (210 microns)
Basic Weight (g/m²)	95 g/m²
Air Permeability (s)	400 l/m² • s (at 200Pa pressure drop)
Electrical Resistivity (through plane)	4.5 mΩ/cm²
Tensile Strength	25 N/50mm
Substrate PTFE Treatment	No
Microporous Layer	No