Check the listing for details. Stan Release OnneX Thumb Echo Grey 3 or 4 Finger Large #8407. Color: Grey, Condition: New with tags. Listed at 299.99 USD. Ships FromFarmsteadOutdoorsBrand New! TRU Ball ReleaseStan Release Onnex Thumb Echo Grey 3 or 4 FingersOnneX Thumb ReleaseFeatures:Specialized trigger mechanisms made from enhanced 440C stainless steelAll handle sizes and release points remaining the same no matter the firing mechanism i.e., Thumb, Resistance, or HingeFully adjustable trigger tension and travelThe Thumb and Resistance models have the incorporated Spring-loaded string keeper for a fast hook up to the D-LoopAdjustable thumb knobs, thumb post extensions, and finger piecesIncludes:Interchangeable 3 or 4 finger extensions (both included)2 different thumb barrel extension lengths made from Stainless Steel2 thumb barrels, small and a large both made from Stainless Steel