If you need to use it for drying 3D printing filaments, you can use a special gauze bag to fill it with orange Silicone desiccant, and then put it inside to achieve better drying effect of filaments. For example: material tray feeding, when there is little filament and the material tray is very light, the filament can be easily pulled up, thereby triggering the machine alarm, causing 3D printing failure or printing pause. Locking buckle fixed design: suitable for 99% of the middle holes of the material tray, the locking buckle structure prevents the counterweight block from falling off when taking and placing the material tray. It can also be used with orange desiccant. When the filament is just used, the filament desiccant can be added to the counterweight tray. When the filament is almost used up, in order to avoid printing failure or pause, the counterweight block can be put in to the filament, so that the filament is not easily pulled up. Due to different batches, there may be differences in product appearance, color, and printed text, which not affect the use. Specifications: B:Consumables weight tool tray + desiccant matching yarn bag Color: Black Material: plastic Package Contents: 1 * consumable weight tool tray 10 * desiccant matching yarn bag Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.