The Ultra Pure Synthetic Urine Kit 4oz Size is premixed laboratory urine designed to protect your privacy during a urinary drug test. The Ultra Pure Synthetic Urine Kit is unisex so a male or female can use it to pass urine drug tests. To ensure passing a urinalysis, the synthetic urine contains all the ingredients normally found in urine and is balanced for pH, specific gravity, creatinine, and several other urine characteristics. The bottle comes with an attached temperature strip and heating pad to ensure the four ounce sample is roughly at body temperature. This kit is perfect for anyone required to submit multiple urine samples to the lab.