ezPOOLBag Disposable Filter Bag for Automatic Pool Cleaners and Pool Robots (opening size ~ 8 1/4" x 12 5/8") EASY - Disposable, does not require washing and cleaning AFFORDABLE - Costs just a fraction of the original cloth filter bag UNIVERSAL - Fits any automatic pool cleaner with a bottom lid measuring ~ 8 1/4" x 12 5/8" WORKS - Provides the same filtration rate as the original filter bag GREEN - Made from biodegradable, environmentally friendly material