Features: Suitable for cleanroom Class 100.Volume resistance ESD 10^5 - 10^9.Friction voltage is less than 100V.Comes in black, blue and red.ESD safe.Nib specification 0.77MM.Retractable Specs: ESD Cleanroom Pen- ISO Class 100-100-000 Construction: ESD Safe Case Quantity: 400 Case Length: 32 Case Width: 20 Case Height: 18