BESTWAY pool hose adapters 38 - 32 mm Intended for connecting 38 mm pool hoses with screw fittings and 32 mm grommets in the pool. Technical data: two pieces in the package for connecting 32 mm to 38 mm suitable for cartridge filtration with a flow rate of 5677, 9462 l-h suitable for sand filtration with a flow rate of 5677 and 7570 l-h.