The Genuine Briggs B360530 Flapper comes complete. It has the chain and hook. Therefore the flapper can connect to the lever. Therefore when the lever is pushed it will lift the flapper causing the flush. This flapper is rubber. However it has a red baffle. Which is plastic. Also the chain and hook are metal. Therefore the will last. 

The baffle or insert on the flapper controls the flush. Therefore once the flush starts the flapper fills with water. It does this at a certain rate to time the flush. Instead of the flapper just closing instantly or waiting too long. The baffle is plastic therefore it will not rust. However the flapper itself is rubber. This is to create a seal and prevent leaks. 

The Genuine Briggs B360530 Flapper comes complete. In conclusion, this flapper is rubber to prevent leaks. Also the chain and hook come with this flapper to connect to the lever. Therefore the lever is pushed to flush. Also the chain and hook are metal. Therefore they will last longer and will not break. This is a genuine Briggs part.

• Genuine Briggs replacement part
• Complete with the chain and hook
• The baffle comes with the flapper
• Flapper is rubber to prevent leaks