Neck Adaptors Square to square Reducing Neck c/w Fixing Clips to suit Lay-In Diffuser Read More Poly Reducing Necks – c/w Butterfly Damper Read More Square to square Reducing Neck Read More Poly Reducing Necks Read More Square to Round Reducing Neck Read More Square to Round Reducing Neck c/w Fixing Clips to suit Flush Face Diffuser Read More
