... *360*225mm Weight: 18kg 18kgSELON VS-5800PC Visible Spectrophotometer, Socket Tungsten Lamp Design, Stable Base Spectrometers, spectrophotometer, spectrometersLow Stray ... a silicon dioxide membrane.The excellent optical system and electric circuit design ensures the very low stray light.Large ... balance before delivery. SELON VS-5800PC Visible Spectrophotometer, Socket Tungsten Lamp Design, Stable Base