Sprue Base "Universal" For 2-1/2", 3", & 3-1/2" Diameter Flasks

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The Universal Rubber Sprue Base is a practical, versatile solution for investment casting setups. Designed to fit multiple flask sizes, this single sprue base accommodates 2-1/2", 3", and 3-1/2" diameter flasks — eliminating the need to stock separate bases for each flask size you use. Features One sprue base fits three common flask diameters: 2-1/2", 3", and 3-1/2" Universal fit reduces the need for multiple size-specific bases Rubber construction for a secure, flexible seal against the flask Compatible with standard casting flask setups used in jewelry production Specifications Compatible Flask Diameters 2-1/2", 3", 3-1/2" Material Rubber Quantity 1 sprue base Show more