Test Thermometer Supplied in a plastic casing which can be used as an extension, doubling the overall length. Features a pocket clip. Spirit filled. Heavy Duty Test Thermometer Supplied in an aluminium case. Features a pocket clip and hanging loop. Spirit filled. Laboratory Thermometer Featuring a toughened stirring bulb and permanent Duramark vertical figuring. Spirit filled. All thermometers are fitted with a no-roll collar. Supplied in safe seal packs designed to cushion impact in the event of dropping.