Outwater 1-1/2in Square Heavy Duty Aluminum Tubing in a black anodized finish is built for signage, displays, frameworks, and structural indoor assemblies that require a stronger square profile. Manufactured from 6063-T5 alloy with a 1/8in wall thickness, this 48in long heavy-duty tube offers durable performance, a clean professional look, and compatibility with F Series 1-1/2in tubing connectors and accessories for modular framework construction.