Air Injected Wedge 7″ Wedge Assembly with Air Gun Our unique air injected wedge developed at a composite shop to assist when conventional part separation methods have failed. Developed from heavy duty tomahawk shaped B3257 wedge and handle shaped B4012, they facilitate using pressurized air to separate parts from their mold. This can be especially useful when demolding wax has failed or was improperly applied. Has 1/4″ NPT holes for easy adaptation for multiple applications.