Has a slender stem that will fit into glass carboys, gallon jugs and other openings as small as 1 inch in diameter. Made out of high impact, FOOD GRADE materials. Making it very durable and appropriate for food application. Our specially polished molds make it very well finished and very easy to clean inside.This is a one man operation funnel on glass carboys. Maximum Temperature: 70 °C (158 °F).