ITEM NAME:Aquarium Lily Pipe Fixture Clip Holder & CO2 Concentration Indicator Monitor Description: Material: Arcylic. Clip Size: 64x40x35mm/2.51x1.57x1.37 inch Compatible with 12mm and 16mm pipe. Suitable for glass pipe and steel stainless steel pipe. Fixture can be installed on below 15mm(0.6") thickness glass. Material: Glass.Size(LxWxDia): 60x35x10mm/2.36x1.38x0.39inch Package Includes: 1 Piece Pipe Holder 4 Piece Screws 1 Piece CO2 Concentration Detector Note: Since the size above is measured by hand, the size of the actual item could be slightly different from the size above. Due to the lighting effects, monitor settings, etc. There could be some slight difference in the color tone of the pictures and the actual item. SKU: DMO0015436819438436.1 Piece CO2 Concentration Detector. Fixture can be installed on below 15mm(0.6") thickness glass. Suitable for glass pipe and steel stainless steel pipe. 1 Piece Pipe Holder. Compatible with 12mm and 16mm pipe.