ABS Plastic Dustproof Waterproof Junction Box Universal Electrical Project Enclosure White 11.8" x 9.8" x 4.7"(300mmx250mmx120mm) The features of mold design are as below: 1. There are perforations on the 4 sides of the product; therefore, the cavity needs a small mold opening. 2. The 4 sides of the I-shaped drive the 4 sides of the slider to pull the core. 3. For the mold of the cover, in order to make the product look beautiful, the anti-adhesive is designed so that the product is firmly on the side of the fixed mold. 4. Simple mold design for easy maintain 5. On the side of the core, insert the insert inside and eject it with a thimble.