Chris, I bought mine over the phone from the maker at 1.800.433.2628 or you can visit them at http://www.tefgel.com/http://www.tefgel.com/tef_gelprices.htm. I bought the TG.25, 1 oz. syringe and the TG-1, a 2 oz tub that should last me for years of normal hardware maintainance. Regards, Glyn Judson E31 hull #55, Marina del Rey CA.