The KUPO External T-shaped Tube Connector (KPC-135) is used to add a T-shaped connection to a structure without having to dismantle the existing structure. It is made of ASTM A197 cast iron, and its surface is treated with double-layer hot-dip galvanizing to effectively prevent rust and wear. It can be tightly connected to a 48.3mm round tube quickly with stainless steel hex screws and can easily install additional round tubes. It is the best choice for both indoor and outdoor construction and does not require additional welding.