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
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)