-Bottom Opening: 2 - 1/8" -Top Opening: 2 - 1/8" -Outside Diameter: 4 - 15/16" (Also replaces 5") -Length: 13 - 5/16" -REMAY Filter media Made in the USA New in Factory Packaging (6) PAck Replaces the following: -Beachcombers Spas - OEM part number 3005815 -Bull Frogs Spas - OEM part number PR. Top Load -Cal Spas - OEM part number 17-2380 -Coast Spas - OEM part number 817-500 -Custom Molded Products EZ Twist Skim - OEM part number 25391 -Hydropool Canada - OEM part number Top Load Cartridge -Leisure Bay Rec Warehouse - OEM part number 817-5000 -Maxx Spas Canada - OEM part number 17-2380 -Morgan Spas - OEM part number 17-2380 -Rainbow Plastics In Line / Top Load - OEM part number 17-2380 -Viking Spas In Line / Top Load - OEM part number 17-2380 -Vita Spa / DM Industries Le Cirque - OEM part number 212320 -Waterway Plastics In Line / Top Load - OEM part number 817-5000 Rainbow Dynamic 50
03FIL1600
100533
6540-471
R173434
3301-2145
5001
Dynamic Series I RDC-50
RDC-50S
R173430
17-3430
R172380
Series II amp; III RTL-50
RCF-50
17-175-1595
73533
212320
LE CIRQUE
4900-41
Series IV DFM
Series IV DFML
373045
17-175-1596
APCC7150
15002
FIL1110022
PRB 50IN
PRB50-IN-Z Other popular brand part numbers ---Unicel - C-4950 C4950 ---Upgrade from 25 sf to 50 sf for Unicel - C-4325 C4326 ---Filbur - FC-2390 FC2390 ---Pleatco - PRB50-IN PRB68