The gasket is a very important piece in your milking system that will keep the bucket completely sealed in order to reach the desired vacuum level.
If you are not reaching the desired vacuum level it would be a good idea to check your gasket.
This particular gasket is for a Melasty 30Lt. Bucket that is used for a Fixed System.
Outside Diameter 7 7/8 Inches
Inside Diameter 6 1/2 Inches