Product Description IRT (Infinite Rate Tune) kit allows for smoother response and active adjustment of spring characteristics in mid-travel, independent of end progression. Manufacturer Number:141-32668-K003 Contents:1 x Manitou IRT kit Manufacturer: Manitou (Hayes Performance Systems) 5800 W. Donges Bay Rd. Mequon WI 53092 USA info@manitou.com Distributor: MERIDA & CENTURION Germany GmbH Blumenstraße 49-51 71106 Magstadt Germany vertrieb@merida-centurion.com