For vinyl liner and fiberglass pools, the Deluxe Air Relief Vinyl Liner Vacuum features great bells and whistles. Perimeter and underside bristles are made of durable quality nylon bristles for longevity. A stainless steel tension spring has been added to the handle which aids in keeping the vacuum submerged and level to the pool floor. Two adjustable air relief valves help control the amount of suction created by the vacuum. The swivel-function hose adaptor helps in maintaining kink-free cleaning operation. The Deluxe Air Relief Vinyl Liner Vacuum can work with 1.25? and 1.5? vacuum hoses.