supply of 10688 - hme (heat and moisture exchange) filtermaterial: plastic, end: 15/22 mm female end; 22mm male end. breathing filter should be combination of pleated mechanical filter and electrostatic charge attraction. the filtration efficiency should be more than 99.99% for virus and bacteria10688 - hme (heat and moisture exchange) filtermaterial: plastic, end: 15/22 mm female end; 22mm male end. breathing filter should be combination of pleated mechanical filter and electrostatic charge attraction. the filtration efficiency should be more than 99.99% for virus and bacteria,10688 - hme (heat and moisture exchange) filtermaterial: plastic, end: 15/22 mm femal e end; 22mm male end. breathing filter should be combination of pleated mechanical filter and electro static charge attraction. the filtration efficiency should be more than 99.99% for virus and bacteria [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]