Product Model:SD1962S Brand:STEELDIVE Movement:Japan NH35 Automatic Movement Movement Feature:24 Jewels, 41 Hours Power Reserve, 21600/h (3Hz) Frequency, Bidirectional Self Wind Case Material:Germany CuSn8 Bronze Case Craft:Matting Back Material:316L Stainless Steel Back Cover:Screw-in Back Cover Case Diameter:41.9mm(Excluding Crown) Case Length:48.1mm (Include Lug) Case thickness:15.6mm (Including Mirror To Back Cover) Strap Width:20mm Case Weight:92g(Excluding Strap) Watch Weight:116g(Including Rubber Strap) Watch Length:265mm(Including Strap) Strap Material:Rubber Strap Mirror Material:Synthetic Sapphire Mirror+AR Coating Mirror Size:33.60*4.65mm (Diameter*Thickness) Crown Style:Screw-in Crown Crown Diameter:7mm Bezel Size:39.80*33.80*1.00m(Outer Diameter*Inner Diameter*Thickness) Bezel Material:Germany CuSn8 Bronze Bezel Feature:Unidirectional Roation Bezel Luminous:Swiss C3 Luminous Water Resistant:200m Hands Length:8.50*13.25*13.25mm（Hour Hand*Minute Hand*Second Hand）