The key specifications of the Catridge, Pre Filter, For 50/75/100 are — CFM: 50/75/100 Polyproplene Media; Dimensions: Ø100x150mm(L). These specifications are based on the standard GEM Equipments design; always verify against your machine's requirement before use. Founded in 1984 and ISO 9001:2015 certified, GEM Equipments Pvt. Ltd. is a Coimbatore-based manufacturer of compressed air dryers, cooling towers, industrial chillers, and compressed air treatment accessories, trusted by 1000+ industrial clients across India.