FORMUFIT 1-1/2" 3-Way PVC Elbow Furniture Grade Fitting in Black, 1.9" Actual ID, (Pack of 4), Made in USA, UV-Resistant, Impact-Proof, Easily Build 3-Point Corners with PVC Pipe - F1123WE-BK-4: Amazon.com: Tools
Formufit 1-1/2 in. Furniture Grade PVC 3-Way Elbow in White (4-Pack) F1123WE-WH-4 - The Home Depot
1/2 in. 3-Way Furniture Grade PVC Elbow Fitting - White | FORMUFIT