Pentair 178616 Compression Spring Replacement Pool and Spa Filter<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Compression spring replacement</li><li>Fits Pentair Clean &amp; Clear Plus pool and spa cartridge filter</li><li>Also fits Pentair Quad D.E. pool and spa filter</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51rtbgHbdKL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51TVjirB55L.jpg" noproxy>