Specifications: Case Specifications: Stainless Steel Color : IP Gun Case Diameter: 40.0mm -Lug to Lug: 46.0mm With Bezel Thickness: 12.5mm (without caseback) Lug Width: 22mm Water Resistance : 200 Meters Bracelet in Brushed / Polished Tapers from 22mm to 20mm Clasp: Adjustable Clasp,No Logo Included: Top Double Domed Sapphire Crystal (Blue Anti-reflective Coating on Inner Surface) 1 Crystal Gasket (more upon request) Sapphire Caseback (With Blue Anti-Reflective "AR" Coating on Inner Surface) Crown (Screw-Down) Chapter Ring Parts Compatibility: Fits SKX007 Chapter Rings 28.5mm Dials for Seiko NH Movements For Movement Types: NH34 ,NH35, NH36, NH38, NH70/71/72 NOTE: Sapphire Crystal is provided UNINSTALLED so you may install your chapter ring first. Comes with .4mm spacer for between the dial and chapter ring (allowing the crown stem to become centered within the crown tube) and so that you can also use thicker (up to .8mm) custom made dials (without the spacer) such as those that are laser engraved with layers.