U-Pass Synthetic Urine 3oz is a laboratory-formulated liquid designed to closely replicate the chemical properties of human urine. The formula contains balanced ingredients such as urea, creatinine, and the correct pH and specific gravity levels to mimic natural urine characteristics. Packaged in a convenient 3oz bottle, it is commonly used for laboratory calibration, equipment testing, and research purposes. The product is premixed and ready to use, making it a convenient and reliable option for various testing applications.