Round steel tube black D=21,3mm

Angle clamp 90°. For connecting horizontal and vertical end pipe 90°.
The advantage of black color is that the color goes very deep into the material, which prevents the pipe member from corroding too quickly.
The black clips are also suitable for outdoor use, but it must be taken into account that the color is not resistant to UV radiation, and long-term exposure of the product to outdoor conditions will cause the color to fade.

Three Way Top Corner. Corner joint (90°) clamp used for top rail corners and any other rectangular system.

Corner With Trough Tube 90°. Often used on intermediate rail corners to match Type 18, tube passes through the clamp.

Four Socket Cross. 4-direction clamp used to fix uprights with 4 horizontal tubes that are perpendicular to each other. Upright tube passes through the clamp.

Coat hook. Hook 90° narrow. Similar to tube coupling type 61, but better suited for making coat hangers and the like.

Black, 3-way T-clamp
The advantage of black color is that the color goes very deep into the material, which prevents the pipe member from corroding too quickly.
The black clips are also suitable for outdoor use, but it must be taken into account that the color is not resistant to UV radiation, and long-term exposure of the product to outdoor conditions will cause the color to fade.