Weldbend® Concentric Reducer, Fitting/Connector Type: Reducer, 6 x 4 in Nominal Size, Butt Weld, 5-1/2 in Length, SCH 40/STD, 1506 lb, Carbon Steel, -20 To 650 deg F, 6.06 in ID x 6.62 in OD x 0.28 in THK Large, 4.026 in ID x 4.5 in OD x 0.237 in THK Small, Domestic