The IRON FIST XXXTREME Poppers 10ml is based on the original pentyl nitrite and is a very strong poppers and made for XXXTREME sessions. Expand your Fist Experience and enjoy extra large parts with the IRON FIST XXXTREME Poppers. This popper is not for beginners. Follow the safer sex rules even when fisting. By the way: Fist Lube is also available for purchase.