Waterway Top Mount Dyna Flow.
210-6547 : 15-3/4" - High Volume
210-6557 : 19-5/8" - High Volume
510-9557 : 21-1/8" - high Volume
High volume, 2" socket, 15GPM. Height 15-3/4" GREY
Hi volume, 2" socket, 15GPM. Height 21-1/8" GREY
Hi volume, 2" socket, 15GPM. Height 19-5/8"