Advantages Transparent display design: The surrounding panels are made of high-quality 3mm thick clear acrylic sheets, which are crystal clear. Up to 98% transmittance which can show your favorite collectibles more clearer. Stackable design: The base is made of high-quality 10mm thick matte wood-plastic board, which is sturdy and stable. You can stack the display case in multiple layers according to your needs. Dustproof function: This acrylic display case can protect your model item from dust and reduce UV ray damage. Color and Size Black: 17.7x17.7x17.5 inch(45x45x44.5 cm) White: 17.7x17.7x17.5 inch(45x45x44.5 cm) Package Including 1 x acrylic display case 1 x decor strip(1.5 meters long) 1 x instruction 1 x cleaning cloth 1 x pair of gloves Installation Instructions Tip 1: Before installation, please wear gloves, tear off the white protective film on both sides of the acrylic sheet, and keep all parts clean. Tip 2: It is recommended to place the display item on the base and put on the light strip before installation. Step 1: First, insert the 2 side panels(with hooks) into the base. (Note 1: The long tabs of the side panels should be installed to the base facing down.) (Note 2: The hooks of the side panels should point up.) Step 2: Then, insert the 2 side panels(with slots) into the base. Step 3: Finally, please be sure to align the slots of the top panel with the tabs of the side panels and tap the top panel firmly to make it secure. Finish. Question 1: The top panel cannot be installed. Answer: In order to make the display case can be a firm unit, the slots of the top panel and the tabs of the side panels are designed to be very tightly(The tab will be the same size as the slot, or a little bigger than the slot). You can use a file to make the larger tab smaller. Or you can remove the top panel and reinstall it, taking this one slot tab that cannot be installed in place as the first one and start installing it. Question 2: How to take out the display item? Answer: You can remove the top panel.