Pall 72971 Spare Parts and Accessories, 47 mm in-Line Filter Holder - Underdrain disc, Type 316 Stainless Steel for Sterile Filtration and Clarification, (1/pkg): Amazon.com: Industrial & Scientific
Pall 4277 Sentino Magnetic Filter Funnels - 47 mm, 500 mL Capacity: Amazon.com: Industrial & Scientific