There is a stainless steel casing, waterproof. Measurement range: -20 to 105 degrees Celsius Length: 2 m Measure ambient temperature Heat-resistant Color: Black material: metal Probe size: 5 x 25 mm Type: NTC 10K 1% 3950 B constant: 3380 K - / and 1% Typical loss constant: 5 mW / degree C Insulation: Larger than 100 MOhm Peak voltage: 2 s, AC 1800 V 1 mA 2 s Package Contents: 1 x NTC 10 K 1% 3950 Temperature Sensor Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.