The key specifications of the Catridge, After Filter For 50/75 CFM 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. GEM Equipments Pvt. Ltd., established in 1984 and ISO 9001:2015 certified, is one of India's leading manufacturers of compressed air dryers, cooling towers, industrial chillers, and compressed air treatment accessories, based in Coimbatore, Tamil Nadu.