We are casting miniature bronze models and mainly use 4 inch diam.
cylinders. Until last year we had no problem buying 4 inch rubber
sprue base with an inside “cup” having an inside diameter of approx.
2 1/4 of an inch and a height of approx 5/8 of an inch to be filled
with wax or modelling clay. For the past year, our supplyer has been
selling us identical bases engraved “india”. Those bases, although
less expensive deteriorate over a very short period of time and end up
being much more expensive. Does anyone know of a manufacturer or
supplyer who could provide us with heavy duty bases which fit the above
dimensions (the inside cup dimensions could be a little higher and
wider but not smaller).