Collar Style retrofits standard sand filter bodies. Top-Mount 7-Function Sand Filter Valve - Collar Style (Previous to 2002). Top-Mount 7-Function Sand Filter Valve - Split-Nut Style (2002 to Present) Picture 2. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Filters". The seller is "poolproductsofnj" and is located in this country: US.This item can be shipped worldwide.