The sealing ring is made of rubber, and it is safe and non-toxic. They are essential accessories of the garden sprayer. It can be used repeatedly and durable for long time use. Features: High quality rubber material, safe and non-toxic, odorless and durable. They are essential accessories of the sprayer in the garden. The sealing ring is suitable for 3/5/8L, easy to use the sealing ring. Comes with 10 pieces of sealing ring, it can meet your need. Reusable and durable: it can be used repeatedly and durable for long time use. Specifications: Condition: 99.99% Brand Material: Rubber Color: Black Weight: approx. 10g Package List: 1* Sealing Ring Notes: 1. Please allow 0-2cm error due to the manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1High quality rubber material, safe and non-toxic, odorless and durable 2They are essential accessories of the sprayer in the garden 3The sealing ring is suitable for 3/5/8L, easy to use the sealing ring 4Comes with 10 pieces of sealing ring, it can meet your need 5Reusable and durable: it can be used repeatedly and durable for long time use