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NORTHWEST  SPAS Spa Filters
NORTHWEST SPAS
These Filters Meet or Exceed Specifications Set Forth By The Spa Manufacturer.
Square Feet
50
Outer Diameter
4 15/16
Length
13  5/16
Top
Open 2 1/8 
Top example and MAY VARY
Bottom
Open 2 1/8 
Bottom example and MAY VARY
Filter Media
3 oz
Replacement Cartridge Filters for these Unicel Products
C-4950
Replacement Cartridge Filters for these Pleatco Products
PRB50-IN
Replacement Cartridge Filters for these Filbur Products
FC-2390
FITS Rainbow Dynamic 50 [03FIL1600]