Product: Tee/Wye Tee/Wye Underground Preinsulated Duct System Tee 8″ – 12″ [203 – 305 mm] Diameter ITEM#SizePDFDWG 08-25208” [203 mm] 10-252010” [254 mm] 12-252012” [305 mm] Wye 14″ – 16″ [356 – 406 mm] Diameter ONLY ITEM#SizePDFDWG 14-257514” [356 mm] 16-257516” [406 mm] Wye 20″ – 48″ [508 – 1219 mm] Diameter ITEM#SizePDFDWG 20-3575F20” [508 mm] 24-3575F24” [610 mm] 30-3575F30” [762 mm] 36-3575F36” [914 mm] *Custom Tees available upon request. May require up to 2 week lead time.