For routings with automatic moldmaking, the height of the cope (the top part of the casting flask) is specified by the machine property flaskHeight.

For routings with manual moldmaking, cope height is calculated by the cost model based on part height: it is the smallest multiple of defaultFlaskHeight that can accommodate half the part height together with an allowance for extra space (the product of copeHeightMultiplier and sandBorderFlaskBottom).

Cope height affects tooling costs, gating system design, machine selection, and material utilization.