The shot glass heating element is perfect for a 1.5 oz shot glass. You can use this to upgrade your TransPro Mug Heat Press, or include this as an additional heating element for the TransPro 3-in-1 Mug Heat Press. Additional attachment included with the purchase of the heating element to ensure the perfect fit on your mug press. This is not a universal heating element for other mug press brands, and can only be used with the TransPro Mug Heat Press and TransPro 3-in-1 Mug Heat Press.