The Dow Filmtec TW30-2521 RO Membrane TFC is a reverse osmosis membrane element with consistent and reliable system performance, which provides high quality drinking water at lower costs.

These RO membranes are tape wrapped and built quality industrial material, and its dry state allow for rapid start up.

Specifications:

Membrane Type: Polyamide Thin Film Composite
Dimensions: 2.5" D x 21" L (listed as 4" x 21")
Max Temp.: 113 F / 45 C
Made in USA

Quality Assurance:

Enhanced quality control throughout the entire production process; eleven different quality checks monitor all critical dimensions and product characteristics. 100% of all DOW FILMTEC™ residential elements must pass an element integrity test before packaging to ensure our customers receive defect-free products.