[Powerful Filtration] The ultra-fine and heavy-duty paper with more pleats for maximum filtration efficiency, easily removes debris, keeping your pool sparkling [Perfectly Fit]Our Ultra Fine Cartridge Filter(Replaces Maytronics Part # 9991432-R4) and climbing ring(Fits with Maytronics Dolphin 6101611-R4) replacement kit is compatible with Dolphin Nautilus CC Plus, M200 / M400 / M500/Wave 65/Oasis Z5i/Aquarius XL/Sigma/DX3 DX4 DX6 [Simple installation]Soak climbing ring thoroughly in water until they expanded and softened enough to install on rollers. Slide them in slowly and ensure that they are sitting in their designated space. [Premium Quality] firmly supports the filter layer and prevents it from breaking during operation. Not easily deformed when pool water flows through, providing maximum hydraulic efficiency and overall structural stability.<br><br>Colour:As Shown Material:plastic<br><br>Package Contents: 4 x filter elements 4 x rock climbing ring<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.