| Total qty | Discount | Per unit | You save |
|---|---|---|---|
| 1 – 2 | — | — | |
| 3 – 4 | 5% off | ||
| 5 – 9 | 10% off | ||
| 10 + | 12% off |
Button style sprue bases — also commonly called donut style sprue bases — are designed to fit securely at the base of casting flasks, providing a centered opening through which wax sprues are fed prior to investing. These sprue bases feature a raised center opening (the "button") that varies in diameter depending on the flask size selected, with the smallest size offering a center opening of approximately 3/8". Eight sizes are available to accommodate flask diameters ranging from 1-1/4" up to 4", making it easy to match the correct base to your existing casting flask inventory.
| Part # | Flask Diameter (Imperial) | Flask Diameter (Metric) |
|---|---|---|
| 121.776 | 1-1/4" | 30mm |
| 121.777 | 1-3/8" | 35mm |
| 121.778 | 1-3/4" | 45mm |
| 121.779 | 2" | 50mm |
| 121.781 | 2-1/2" | 65mm |
| 121.782 | 3" | 75mm |
| 121.783 | 3-1/2" | 90mm |
| 121.784 | 4" | 100mm |
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