Vintage Antique Foster Seal Fast Ball Lock Glass Mason Pint Jar. I love old jars. Don't see many Foster Seal Fast jars in our area. Neat and unique. Love to store all sorts of fun things in old jars. Use in any room of your house. Store buttons, clothes pins, dried orange slices, beans for pantry display, bathroom items like cotton balls, gosh just so many things. Pint size ball lock, all original, no chips. Just a great jar! Size is 5 3/4" tall x. 3 1/2" diameter.