PLEASE NOTE: These are the older filter sliders for the previous version of the Filter Drawer. These will be discontinued once ZWO runs out of stock.
See New M54 Filter Slider Here
One additional 2" filter drawer slide for the ZWO M54 to M48 Filter Drawer System
Filter slide: M48 * 0.75 female thread
The drawer system is a total of 21 mm in thickness.
The strong magnet holding the slide creates a good seal and avoids accidental filter drops.