Detectable factory pen with regular ink - preferred option for the majority of applications. Best suited to dry and ambient conditions. Benefits from superior retractable cartridge mechanism, large lanyard loop. Now available in four ink colours. Manufactured by Retreeva Global. Supplied in packs of 25.Maximum detectability - Metal and x-ray detectable pens moulded from FDA food contact approved in the universally accepted blue colour for visual detection. (Also available in red, yellow and green polymers.)Positive retracting mechanism - Cartridge will not jump out of position however much pressure is exerted on writing point.Highly visible ink indicators - Dominant top button and large window identify ink cartridge colour.Unique cartridge suspension - Provides that firm writing experience without the need for a metal spring.Smooth finish - Comfortable to hold, retains grip, easy to clean.Contoured for thumb and finger - With textured surface for enhanced grip without compromising hygiene. Large lanyard loop - Intended for a real lanyard, not just a thread.Safe under duress - Moulded from shatter resistant polymers to avoid splintering if crushed.Long writing life - superior quality European ink cartridge with Tungsten Carbide ball for anti-abrasion, smooth, consistent ink flow. More than 10 km of writing length!Choose from four ink colours - In addition to blue ink, also available in red, black and green ink.Retreeva Global metal and xray detectable pen housings conform with European food contact regulation EC 1935/2004 and meet FDA standards for use in the food, beverage, medical and pharmaceutical industries. Ink cartridges comply with ISO12757-2.