Note: Please allow slight error due to manual measurement. Thanks for your understanding. 5 Layer Design: The watch parts storage box has 5 layers, allowing you to distinguish between different types of watch parts. Sorting and storing small parts in different layers in a neat and orderly manner, organizer meets your basic needs for storing Stackable Storage Box: Watch parts storage organizer can be stacked vertically to save desktop space and leave more space, improving work efficiency. Each layer of watch movement holder can be rotated and disassembled to assemble according to your needs Acrylic Material: Our watch parts storage containers are made of acrylic material with good sealing performance, keeping components away from dust and easy to wash. Watch parts storage box transparent withstands wear and tear, ensuring a long service life Lightweight and Portable: Watch screw storage box is small, lightweight, easy to carry. Transparent and visible, watch movement parts storage allows for accurate access to parts. Single box diameter is 38mm / 1.5in. Combination box height is 97mm / 3.8in Wide Applications: Watch parts container is versatile for holding screws, movements, crowns, and is tool for watchmakers and repairers.Watch movement parts box can also be used to small accessories, crafts, beads, earrings, rings and other jewelry