Product Description From Fiitzn, A World’s Leading Brand for Replacement Water Filters ? Refreshing Water ? Great Value ? Precise Fit ? Friendly Service SPECIFICATION? Compare to Part Number#9991433-R4 Package Included?4 Pack Replacement Water Filter Dimensions: 10-1/2" x 6-3/8". Packing list: 4 pieces. COMPATIBLE MODELS? Dolphin Sigma Dolphin Liberty Dolphin Aquarius XL Dolphin Nautilus CC Plus Dolphin Oasis Z5i Dolphin Supreme M4 Supreme M5 Dolphin Wave 65 Wave 90 Dolphin C3 C4 Dolphin Triton Plus(OLD) Durable: Made of ABS plastic frame material, more durable. If used correctly, these ultra-fine filters can last for 2-3 years. WARM TIPS? 1. Any use of the DOLPHIN brand name or model designations for this product are made solely for purposes of demonstrating compatibility.