Material: Kratky lids are made of high quality acrylic material, sturdy and reusable, fits perfectly in wide mouth mason jars and other jars.Our blackout sleeves are made of high quality 210D polyester,comes with an adjustment buckle, can washable and reusable.
Package include: You will get 12pcs mason jar lids with a diameter of 86mm and 12pcs blackout sleeves, the blackout sleeve fit 32oz wide mouth mason jars,which are enough for you to use in daily hydroponic system or replace.
Function: Our lids are perfect for mason jars for kratky hydroponics, it is black and blocks most of the light from above into the jar.Our blackout sleeves allow you control light for different sprout seeds. It can keep light out of your container when hydroponic use.
Easy to use: With this kratky jar cover, just set it and then watch your plant slowly drink water from the mason jar while enjoying the lush foliage growth.you can only put the mason jar into the blackout sleeve ,then tighten the adjustable buckle.very easy.
Wide use: Kratky hydroponics is the most passive form of hydroponics, and hydroponic cover lids and blackout sleeves can help you grow more plants easily!
