HydroTools by Swimline Weighted Half Moon Pool Vacuum Head Hydro Tools weighted half moon vacuum is head weighted (1-1/2 pounds) to stay down making pool vacuuming easier Hydro Tools weighted half moon vacuum accepts 1-1/4 or 1-1/2 inch vacuum hose Quick snap pole adapter fits 99% of vacuum poles Replaceable brushes available Designed for all pools; model 8110