This is a trials, single cable fast action throttle.  It has a set speed of 3.7°/mm max stroke 44mm

The lower the °/mm, the faster the throttle opens. Maximum stroke refers to the distance the cable is pulled into the throttle housing.

Available without grips or with either Domino standard black grips or Dominos Dual Compound A240 Trials Grips in a choice of colours - Please select from the options below