1 set included 2 O rings that fit all the following housing but make to select the right product during checkout.
1- Max Water Reverse Osmosis Systems with double o rings Housing
2- Max Water 10" Whole house with double o rings Housing
Diameter for the First O rings P# 105458:
- OD = 85 MM // Approx = 3-1/2 inch
- ID = 82.5 MM //Approx 3-1/4 inch
- CS = 3.5 MM //Approx 1/8 inch