This kind of thermometer is mainly used in ships, pipelines and some heating or cooling facilities. It remains direct and accurate, and more reliable and resistant to vibration. The thermometer is made up of three parts: Case, stem and glass insert. In the aspect of shape, we have three type: JWV-11 (straight), JWV-12 (90degree angle), JWV-13 (135 degree angle). Material of case: Aliminum die-casting Appearance: Polishing sandblasting anodizing Length of case: 110mm, 150mm, 200mm Material of stem: Brass (below300 ?C / ?F), carbon and Stainless steel (above 300?C / ?F) Length of stem: 30mm, 40mm, 50mm, 63mm, 75mm, 80mm, 100mm, 150mm, 200mm, 250mm Fillings: Organic liquid or mercury Range: (-30-50 / -30-70 / 0-60 / 0-100 / 0-120 / 0-160 / 0-200 /0-300 / 0-400 / 0-500 / 0-600) ?C / ?F, Scale division: 0.5 ?C / ?F, 1.0 ?C / ?F, 2.0 ?C / ?F, 5.0 ?C / ?F, 10.0 ?C / ?F; The accuracy is controlled in ?1 line Thread: 3/8", 1/2", 3/4", M16 x 1. 5, M20 x 1. 5, M22 x 1. 5, M27 x 2