Accommodating mice or rats, our Metabolic Cages offer 99% separation efficiency of urine and faeces, assuring maximum purity of samples. Each cage may be placed on a single cage stand or a stainless steel rack accommodating up to eight cages. Animal waste is directed through a collection funnel and onto a linear diffuser. The diffuser allows solid matter to travel down the top ridges of a 50% incline, passing over a urine port, and into a faecal collection vessel. Liquid waste flows along grooves down the inclined diffuser, passing through the urine port, and into a urine collection vessel. A urine deflector prevents excess urine from splashing and contaminating faecal specimen. Separate urine and faeces samples are collected in two standard 50 ml. centrifuge vessels.