【Perfect Fit】 Compatible with Dolphin M200, M400, M500; Nautilus CC Plus (Not for Nautilus CC); Oasis Z5i, Odyssey, Sigma, C3, C4, Triton Plus (old), Aquarius XL robotic pool cleaner filters; part# 9991432-R4. All manufacturers' names and part numbers are used for compatibility information only. 【Dimensions】 10-1/2'' x 6-3/8'' per filter, the same as the original filters. Help pool you get the most enjoyment from your Pool. Product Features: Ultra-fine Filtration: Pleated filter media is used to filter all kinds of ultra-fine debris in the swimming pool, such as fine sand, leaves, etc. Durable and Last Long: Made of ABS plastic frame material, more durable. If properly used, these ultra-fine filters can last 2-3 years. Compatibility: Compatible with Dolphin Triton Plus, Nautilus CC Plus, Dolphin Supreme M4, Supreme M5, Supreme M200, Supreme M400, Supreme M500, Liberty, Wave 65, Wave 90, C3, C4, Oasis Z5. Product Specification: Dimensions: 10-1/2" x 6-3/8".