Allextreme product description: Specification: Condition: 100 percent brand new material: Machined from durable abs plastic size: Universal 7/8 inch (22mm) weight: 60 grams colour: Black package includes: 2 x throttle accelerator control instructions included features: Full throttle control with a relaxed hand. Comfortably fits, reduces the strain on your fingers, wrist and arm reducing problems with fatigue, tendonitis, carpal tunnel Especially beneficial when wearing heavier gloves the throttle assist will make the rotation of the throttle grip easier, easy on, easy off.