1. 18 different sizes of strap spring bars, including 6-25mm
2. Stored in a transparent plastic box, different sizes are stored separately, easy to access
3. Material: stainless steel
4. Length: 6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23/24/25mm
5. Weight: about 45g/box
6. Tube thickness: about 1.5mm
7. Box size: about 12.1x6.9x1.6 cm/box