Material: Hubs of coupling: 1.4305, AISI 303 (1.4571, AISI 316 Ti on request). Spider: Polyurethane, Shore hardness 92°A. Spare spiders either 92°A or 98°A or 64°D Shore. The couplings are available without bore or pre-drilled ex stock. Custom bores or feather keyways available at extra charge. Temperature range: -20°C to +80°C. * B is the avarage dimension by which, e.g., a driven or driving machine has to be moved in order to demount one of the coupled units in vertical direction. Weights refer to max. customized bore without keyways.