Hayward Gasket Widemouth Butterfly Style

Hayward part number SPX1091GW. Widemouth Skimmer Gasket. Butterfly Style: 2 Gaskets joined at the inside hole. Inside gasket slips into wall skimmer opening. Outside gasket stays on other side of wall. Outside length: 13-7/8 In. Outside height: 7-1/2 In. Inside length: 12 In. Inside height: 5-1/4 In. Total number of holes: 24.