Freudenberg H14C14 is a flexible and easy to use carbon paper based gas diffusion layer (GDL) with a microporous layer (MPL) as well as a hydrophobic treatment for the substrate side. It is ~145 um (microns) thick @ 1 MPa.

Freudenberg H14C14 is recommended for:

LT-PEMFC stacks targeted for automotive and stationary CHP applications
Applications requiring a very thin GDL with a MicroPorous Layer (MPL)

Freudenberg Fuel Cell and Electrolyzer Carbon Paper GDLs Technical Data Sheet

Freudenberg Fuel Cell and Electrolyzer Carbon Paper GDLs SDS

Gas Diffusion Layer Properties
X-Material Type	Carbon Fiber Paper
Thickness	0.145mm (145 microns) @ 1 MPa Compression
Air Permeability (s)	0.5 (TP Air Permeability acc. to Gurley ISO (5636-5) )
Electrical Resistivity	5.5 mOhm.cm2 (TP electrical resistance @ 1 MPa compression)
Substrate PTFE Treatment	Yes, (proprietary PTFE % value)
Microporous Layer	Yes, on one side (proprietary PTFE % value)