Polyethersulfone (PES) hollow fiber UF membranes were fabricated usingethanol (non-solvent) as additive and N-methyl-2-pyrrolidone (NMP) as asolvent. Asymmetric hollow fiber UF membranes were spun by wet phaseinversion method from 18 wt. % solids of 18:10:72 (weight ratio) PES/Nonsolvent/NMP solutions. https://homehardware4ues.shop/product-category/backer-rod/