These corrosion-proof 16" CPVC 90° Elbows are for the construction of exhaust ventilation systems. CPVC material compounds used in the manufacture of these duct fittings conform to Type VI, Grade 1 CPVC, Cell Class 23447 as described in ASTM D-1784. These elbows are a three piece design which is considered standard and are furnished with a centerline radius approximately 1-1/2 times the duct diameter. Centerline to end is 18" and socket depth is 2.5". Maximum service temperature is 200°F. NOTES: Fittings are triple bead welded. Pictures are to represent style of fittings only; actual color is light gray.