Aluminum Mold Base designed for the APSX-PIM machines. This mold is designed by the PCS Company specifically for the APSX-PIM injection machines and comes with the bushings and pins installed along with the ejector plate. You just need to machine the cavities. It uses four shoulder bolts on the left and the claws on the right side. Please mount it so that the upper side is flashed to the block 4's upper side. Shoulder bolts are intentionally longer to create a small gap between the mold and the nozzle plate. This keeps the mold cooler since it gets in full contact with the nozzle plate only when fully clamped. When you install the left side with four shoulder bolts and the right side with claws, you can use manual control buttons to clamp the mold to check the alignment. When they start to mate, you can HALT the machine to stop. This video on our YouTube channel may help you to understand how to install the mold on the machine: Dimensions: 4.8"W x 6.0"H x 3.625"D. PCS APSX-PIM Mold Base (STEP)