The most trusted Synthetic Urine in the industry. Quick Fix® Plus Synthetic Urine is the 3-ounce version of Spectrum Labs’ patented laboratory urine that is conveniently premixed with urea. Quick Fix® Plus is a unisex synthetic urine for use by either men or women. It contains ingredients normally found in urine and is balanced for pH, specific gravity, creatinine, and several other urine characteristics including urea. Quick Fix® Plus comes with an attached temperature strip and heating pad to ensure the sample is at the proper temperature.