White polystyrene reservoirs have angled sides with graduations at 50, 25, 10, and 5 mL. A narrow, V-shaped micro-channel at the base improves recovery of small volumes. Strong sides and wide bases provide stability and easy handling. Multi-channel compatible. Corner pour spouts help avoid spills when emptying. Do not autoclave. Measures 152 x 86 x 29 mm. Sterile reservoirs are certified free of detectable DNase, RNase, and pyrogens; non-sterile reservoirs are certified free of detectable DNase and RNase.