Pressure Chamber Versatile Unit for Pressure Casting Liquid Rubber and Liquid Plastics. Pressure casting resins is optimal for creating castings that are truly bubble free. Recommended Pressure for Pressure Casting; 60 psi. Can be pressurized to 80 psi. Inside Dimensions: 12.5" (31.75 cm) diameter opening X 15.25" (38.74 cm) Tall