•Brand: OPK
•Model Number: 8131
•Watch Glass: High Hardess Coated Mirror
•Movement: Original Quartz Movement
•Watch Bands: Stainless Steel
•Water Proof: 30 Meter Water Resistant
•Dial Shape: Round
•Watch Weight: 97g
•Dial Thickness: 10.5mm(about 0.41inches)
•Dial Diameter: 40mm(about 1.57inches)
•Strap Length: 200mm(about 7.87inches)
•Strap Width: 18mm(about 0.70inches)