This is no ordinary spa filter. This is a Dimension One Spas OEM branded filter from Pleatco. The top of the filter has threads to screw on your Dimension One Spa Vision Cartridge for maximum water purification. (See Pictures)
Dimension One 75, @Home Hot Tubs (open w/twist lock)
Other manufacturers and there matching part numbers
To purchase Dimension One Spas Vision Cartridge please click here.