This coffee machine replacement kit includes 17 O-rings specially designed for BES900 / 920 / 980 / 990 series coffee maker These rings are selected from rubber, safe and long This coffee machine piston seal provide seal for the and the soft connection tube, prevents leaks and ensures By replacing the worn O-rings with these new, you can extend the life of coffee maker and enjoy coffee for These coffee machine replacement o-rings are designed for easy replacement and can be installed without the need for special tools or skills