50pcs biorad 1703932 Ultra-thick transfer filter paper 7.5X10cm | eBay
Nitrocellulose/Filter Paper Sandwich, 0.45 μm, 8.3 x 7.3 cm
Quantitative filter paper, ashless, grade 5B, 500mm Ø, 108gm², 0.21mm thick. Retention 5-10µm at medium flow rates. For general purpose filtration. Pack of 100 - Lab Club