Medium kit comes on a 33″ by 33″ base with a GV100 pump

giving you optimal performance

By eliminating splash and reducing evaporation

and 2400AF Surface Aerators (115V) both use the same motor

Replacement Matala Mat for PS3900 Skimmer splash ring Medium kit comes on aReplacement Matala Mat for PS3900 Skimmer The SM3900 Replacement Skimmer Mat is designed for use with the PS3900 Skimmer to trap debris before it reaches the pump in the pump chamber. This skimmer mat features a top width of 15. 5", bottom width of 14", height of 17" and thickness of 1. 5". Installing this skimmer mat guarantees that the pump chamber of your skimmer remains clean and free from debris. Details: Manufacturer's Part # SM3900 Approximate