This is a case for storing Mini 4WD brake sponges. It uses tempered glass for the storage surface, preventing double-sided tape from sticking and keeping the adhesive surface clean. It can also be used as a base for applying double-sided tape to brake sponges. By applying the double-sided tape to the glass surface first, you can cleanly apply the tape to the brake sponge. Because it uses tempered glass, it can also be used as a glass cutter mat.* *The strength is similar to that of a smartphone glass film. Please be careful as it may break if excessive force is applied. 【Size】 Outer dimensions: 10.2cm (H) x 16.7cm (W) x 1.0cm (D) Inner dimensions (one side): 9.3cm (H) x 16.4cm (W) x 0.5cm (D) (1.0cm space is created between the top and bottom) 【Material】 PLA (Heat distortion temperature 0.45 MPa = 57°C) *Please be careful as it may deform if exposed to high temperatures such as inside a car in summer.