The Casting Block allows you to cast a perforated flask in a vacuum chamber on top of a basic investment table.&nbsp;It will help reduce porosity, increase metal flow in smaller areas, and give you a better overall product. Other Size Plates Available: 3.0" - <a _mce_href="/products/21-4996/?groupId=117067" href="/products/21-4996/?groupId=117067">21-4996:300000:T</a> 3.5" - <a _mce_href="/products/21-4996/5180635/?groupId=117067" href="/products/21-4996/5180635/?groupId=117067">21-4996:350000:T</a> 4.0" - <a _mce_href="/products/21-4996/5180636/?groupId=117067" href="/products/21-4996/5180636/?groupId=117067">21-4996:400000:T</a>

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