Watch men's automatic mechanical watch hollow flywheel $ 21.72 Dial diameter: 44mm Waterproof performance: 30M Thickness: 13mm Buckle material: stainless steel Strap material: stainless steel Case material: metal Clasp style: single folding buckle Style: business A: White shell white noodles B: White shell and black surface C: Golden white noodles D; between gold and black surface