Based on this product's specifications, here are some alternatives and similar models
BWT membrane Bestaqua 14 ROC – reverse osmosis membrane for water filtration, model 3001010013
Summary description:
BWT Bestaqua 14 ROC is a reverse osmosis membrane designed for water filtration systems. It serves as the semi-permeable element that separates dissolved solids from feed water, supporting potable and process water production. Intended for use in RO units compatible with the specified BWT membrane model, it is used in domestic and light commercial filtration to reduce TDS, salts and contaminants.