The World's Easiest Jar Opener - For Tall Lids! Patented and design awarded jar opener that fits preserving jars with tall lids. Fits lids with a height of 15 - 20 mm. The JarKey is placed against the lid of the jar, and with a slight lift, the vacuum is released, and the lid can now easily be unscrewed. Size: 14 x 5 x 3.5 cm Net weight: 37 g Colours:White