Ensure your plants get they need with our mason jar blackout sleeves. These covers are suitable for hydroponic systems and sprouting, providing complete light blockage to promote healthy growth. The wide mouth design allows for easy use, while the durable material ensures performance. Features -Color:Black -Material:Cloth -Size:15.00X9.60X9.60cm/5.89X3.77X3.77in -Efficient light shielding: crafted with cloth materials, the mason jar blackout cover effectively blocks out light, ensuring the contents remain unaffected by light exposure -Prolonged preservation: by preventing sunlight exposure, the blackout cover helps extend the preservation period of food, medicine, and other items, maintaining their freshness and quality -Multipurpose application: designed to fit various mason jar sizes, it is ideal for storing a wide range of items including food, medicine, and spices, making it highly versatile -Water resistance: the blackout cover offers excellent protection against water, keeping the contents -Easy portability: the lightweight design of the mason jar blackout cover makes it easy to carry, making it suitable for outdoor activities like picnics and camping, ensuring your food stays Package list: 1 x Sprouting Jar Sleeve