The TCS Aluminum Flask is used for the injection of TCS Unbreakable. This item is milled from one piece of aluminum block,  its extra smooth finish facilitates the de-flasking process. Additionaly, the TCS Aluminum Flask is manufactured with a special Knock-Out Plug that is hammered out to make removal of the case easier and to eliminate damage to the flask. Many other flasks are casted and therefore, porous, causing stone to easily stick to them, significantly decreasing the life of the flask. MADE IN THE USA