The Standard Quartz Cell (p/n 100-07-50) is designed for use in the Environmental Fixture 100-14, Environmental Chamber 100-07, or Peltier Environmental Chamber 100-30, or for stand alone use. When used with a straight or inverted needle, it can facilitate captive bubble, inverted pendant, inverted sessile, liquid / liquid, and interfacial tension studies. The outside dimensions are 45 x 30 x 45mm. More details and specifications, see: http://www.ramehart.com/accessories.htm#100-07-50. An optional lid (p/n 100-07-50-LID) is also available.