Nylon tea bags, perfect for green tea and black tea. - Quantity: 10 bags - Size: 9cm long - Usage: For green tea, black tea, and herbal tea - Material: Nylon - Example use: Suitable size for plastic bottles and personal water bottles I purchased 20 pieces, used a few, and have been storing them at home. After opening, the bag was sealed with a heat sealer. This is a product from Yutakana Seikatsu Rakuten Store. Thank you for viewing.