Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon Universal Sprue Base by Grobet Sale $7.40 | / SKU 21-780 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available Universal Sprue Base One size fits all 2-1/2", 3", and 3-1/2" flasks.