The Eco+ gasket consists of a solid stainless steel carrier covered on both sides with a narrow graphite or PTFE overlay. The Visio gasket consists of a solid stainless steel carrier with embossed inner and outer teeth and graphite or PTFE overlays on both sides. Towards the media side and, in the case of the Visio, also towards the atmosphere side, a resilient "tooth" is embossed to provide a metallic seal on both sides of the flange. The resilient "tooth" can absorb alternating forces caused by pressure and temperature fluctuations without plastic deformation. There is no need to retighten the bolts when starting up the system, as is the case with comb-profile gaskets, for example.