Kill'n Stix Aluminum Outsert MicroVentilator 300 Black Pack of 12. These Arrow and Insert Tips brought to you by Kill'n Stix have larger landing and cutting diameters which means they provide your arrows with better penetration on game. This Kill'n Stix Alum Outsert MicroVentilator 300 is also a little longer which gives your arrows a little more momentum which means they penetrate better which is essential when you're trying to take down big game in the wilderness. Pick up the Kill'n Stix Ventilator Inserts today to boost the speed and accuracy of your shots. Package Contents: Kill'n Stix Aluminum Outsert MicroVentilator 300 Kill'n Stix CKSMBAO43-12: Aluminum Outsert MicroVentilator 300 Black Pack of 12