The Tower 100 Mini ITX Chassis is the mini version of our iconic case The Tower 900 4mm Thick Tempered Glass Window Panels: three 4mm thick tempered glass window panel at front, left, and right Handy I/O Port and unique internal design: with a high speed Type-C connector and two USB 3.0. The Tower 100 supports up to two 3.5’ HDD or four 2.5’ SSD, include two bracket for 2.5’ SSD at right side. Dust Filter Design: Eight super fine filters on the right, left, top, and at the bottom are designed to provide excellent protection against dirt and dust from the outside of the case and is easily removable for cleaning.