Product Information Material: Iron Seal: Natural Rubber Working Pressure: 200 PSIG at 70°F (21°C) Select a Product Part NumberStyleSize SL100MSmall Head1" SL038MSmall Head3/8" SL150MMedium Head1-1/2" SL075MSmall Head3/4" SL050MSmall Head1/2" SL200MMedium Head2"