Models View all Duct to Muti cyclone (Duct Reducer) 0 18 0 SYJ 511 TF (D 2") 0 24 0 SYJ 505 TF ;20 6 66 1 FYTB 1 - 1/2" 508 4 58 0 FYTB 1" TF 8 142 0 Flat ToP Chain 6 216 1