Item specifics:

100%brand new and high quality， easy to install.
Color: Silver
Material: Stainless steel
Thickness: approx. 1.5mm
Quantity: 30 pieces(15 sizes in total， 2 spring bars of each size )
Size: 8mm     9mm   10mm
         11mm   12mm 13mm
         14mm   15mm 16mm
         17mm 18mm 19mm
         20mm   21mm 22mm

Package Included:

1 x 30 pcs spring bars