Here is a brand-new set of replacement filters to fit your Becker U4.400 SA/K vacuum pump. 

If you were to buy this from Becker you would use part number: 965410.

Replacing filter elements will help keep your pump running well, as they can become clogged.

 I charge actual shipping amounts and will combine shipping.

Contact me with any questions or with your Becker pump model number and I can help you figure out which filters it takes.  Thanks.