This material's excellent fluid compatibility makes it ideal for pumping aggressive fluids such as aromatic or chlorinated hydrocarbons, acids, caustics, ketones, and acetones. However, PTFE is an inelastic, rigid material. Most traditional diaphragm pump designs are not optimized for PTFE diaphragms, as they are rigidly linked to a transmission shaft with long strokes. This causes significant deformation with each stroke, which is suitable for rubber or thermoplastic elastomer diaphragms but results in a short lifespan for PTFE diaphragms in such pumps.