Product Description Rugged and easy-to-use temperature indicator is a solid, reliable choice for everyday usage. Simple to use, with no gauges or electronics. No calibration is required. Has a unique slip-resistant metal holder, specifically engineered for smooth operation and maximum user control. Superior quality ensures that temperature indicator is free of contaminants such as sulfur, lead and halogens. Efficient indicator provides fast results, reducing set up and down time. From the Manufacturer SEPTLS719TS0650 - Tempilstik Temperature Indicators