0 Duct End Seals Duct End Seals- For use with the standard lock rings. Download DES pdf Code DES Dimensional Specifications Product Code D mm DES80 80 DES100 100 DES125 125 DES150 150 DES180 180 DES200 200 DES225 225 DES250 250 DES275 275 DES300 300