size:
 Thickness: 0.8mm, 1.0mm, 1.2mm, 1.6mm
 Inner diameter: 6mm, 8mm, 10mm, 12mm
 Colors: Stainless steel, gold, pink, black, full color
 Unit price: 0.8mm 3.8 yuan/piece
 Other thicknesses are 2.8 yuan/piece