EDGE Welding Cup Adapters make certain your cups fit exactly as needed. No fuss, simple and easy to use and specifically designed for use with our pyrex glass welding cups. We feature several series of adapters to choose from. Choose your specific series and make sure to consult your specified welding cup product to choose the right adapter for your glass cup purchase. If for any reason you have questions in relation to what size adapter is correct for your cup purchase or torch, we are available to help you 24/7 with any and all questions related to your EDGE Welding Supply shopping experience or products.