Vogel Group Sizing Card
Ever wanted to know how big your group size is? Well here you go; the Vogel Group Sizing Card is perfect for any shooter shooting a .177 air pistol. Simply hover over your group until the whole group is inside the "O" in Vogal and that's your group size! The Vogal Group Sizing Card is the same size as a traditional credit card, so you can keep this on you where ever you go.