With sturdy structure and fine workmanship, this pool filter pump connector is not easy to deform, break and can achieve long term use. You can install it conveniently by yourself without tools. With high durability and perfect fit, this pool filter pump connector is an ideal replacement for the old or damaged original pool filter pump connector. Made of plastic, it is lightweight, wear-resistant and durable to use. The caliber of this product is 3.8cm. Compatible for SPX1091Z7 SPX1091Z4 Item Name: Filter Pump Adapter Material: Plastic Features: Heavy Duty, Professional, Threaded Size Details: Caliber: 3.8cm/1.5" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Filter Pump Adapter Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.