Part Number: SD3-57-1241XAA (Duct flexi)Part Number: SD3-57-1242XA (Duct flexi)Part Number: SD3-571242XAA (Duct flexi)Part Number: SD3-57-1243XA (Duct flexi)Part Number: SD3-57-1244 (Duct flexi)Part Number: SD3-57-1244XA (Duct flexi)Part Number: SD3-57-1246 (Duct flexi)Part Number: SD3-57-1246XAA (Duct flexi)Part Number: SD3-57-1249XA (Duct flexi)Part Number: SD3-57-1250 (Duct flexi)Part Number: SD3-57-1253 (Duct flexi)Part Number: SD3-74-0200XAA (Duct flexi)Part Number: SD3-74-6032XA (Duct flexi)