"Angles" part of a gating kit to be used in mold making for metal casting. Designed to be used with "dry" sand methods but has potential to be used for "green" sand. This is an attempt to cut down on silica exposure after a mold is made where gating is sometimes carved in. Cross section area is about .38 in. Trapezoid dimensions: a = .5 , b = 1 , h = .5

Disclaimer: Always use proper PPE when working with silica and molten metal. You are responsible for your safety.