Measures: 2 Inches Material: Made of ABS material, sturdy and durable. Fitment: FNS, FNS Plus, Plus pool and spa D.E. filters Tools required for installing products: Towel Adhesive Spanners Gasket Small Flat Screwdriver Installation: 1 Turn off the power to the pump. 2 Change the setting to closed and remove all the bolts.Carefully pull the multiport out,inspect it and give it a clean. 3 Remove the old gasket.Remove the old adhesive and dry the seating.Put some adhesive in the seating.Press the gasket into place with the ridge side facing up. 4 Put the new multiport unit back in,Loosely put the bolts in and tighten them in a star order.Leave it in the closed position for 24 hours.