Custom precision die-cut membranes are manufactured to specification using a proprietary process that produces smoother edges than compression cutting and is performed in a clean, positive-pressure facility. They can be produced from a dxf, pdf, or almost any type of drawing file, are made from polytetrafluoroethylene (PTFE), nonwovens and other materials, and can incorporate intricate shapes, including narrow cross-sections and close hole spacing. Membranes as small as 1 in.2 with ±0.005 in. tolerances can be supplied on rolls, with or without an adhesive backing.