The different degrees of hardness of the T-PUR-spider allow to adjust the level of damping and torsional stiffness of the elastomer coupling.ROTEX Spider / Elastomer Material :Our elastomer material T-PUR® (elastomer) is resistant to higher temperatures and has a considerably longer service life than common polyurethanes. From a visual point of view we marked the T-Pur material by the colours orange (92 Shore A), purple (98 Shore A) and light green (64 Shore D).The previous polyurethane spiders in the colours yellow, red and natural white with green marking of teeth continue to be available on request.Your Benefits:- Longer service life- Extended temperature range of more than 40 %- In the temperature ranges from +40° C to +90° C the temperature factor has been improved by up to 23 %- Maintaining all technical properties- Same price as the traditional spidersOTEX shaft couplings consist of two hubs (aluminium or steel) and a spider (elastomer ring / cam ring) made of T-PUR® (elastomer)