Reverse Osmosis and Under Sink Water Filter Housing Wrench – Opener Tool for 12” Filter Canisters (10” Filters)Make your filter changes quicker and easier with a Water Filter Housing Wrench. The wrench is compatible with all standard reverse osmosis and undersink base filter housings. These housings are generally 4 6 8 x 11 5 8 x 3. 5 and use 10 x 2. 5 filters. With simple, durable, four tooth equal grip design removing filters is simple. The wrench is made of plastic so it doesnt warp or damage the filter housings. The BPA free construction ensures that your