3M NanoSHIELD LDC Hollow Fiber Series filter capsules contain 3M NanoSHIELD Series filter cartridges available with membrane material of construction of polypropylene, and polyethylene. 3M NanoSHIELD LDC Hollow Fiber Series filter capsules have been engineered to combine a high level of particle retention with high flow rates and low pressure drop for the most demanding applications.