Genuine Unicel Hot Tub Spa Filters. 

• Part no: 4CH-949
• Diameter: 4-15/16"
• Length: 13-1/2"
• Top: Handle
• Bottom: 1-1/2" Female SAE Thread (not pictured)
• 50 sq.ft.
• Filter Media: Reemay
• Brand: Unicel Premium

This Unicel hot tub filter replaces the Pleatco PWW50L, Master Deluxe M40508 and Filbur FC-0172.