This probe features an enlarged air passage opening to get the maximum airflow. In combination with the 'Dual Hole, V2 High Flow Transfer Port' you will gain the ultimate performance out of your FX Impact. These sets are developed for slugs and pellet use and can be used in combination with thr Huma Air power tuning hammerspring. 

Available in .177, .22, .25 and .30 calibers.

NOTE: Any modification done to the airflow of your rifle will affect the entire setup and performance, you may need to re-adjust the settings of your rifle again to get the best possible performance.

[Need the whole kit? Find it Here - Impact Caliber Exchange Set .22 , Impact Caliber Exchange Set .25, Impact Caliber Exchange Set .30]