We provide customers with a series of heat shrink tubing which can meet various strict application requirements. For example, the medium wall heat shrink tubing products are halogen free and UV resistant so as to provide effective insulation, protection, and sealing for flexible wire joints, accessories, and connectors. This medium wall shrink tubing can also provide long-term and reliable service even in bad weather and when exposed to heavy contamination. The products are used in many public facilities such as power facilities, public lighting facilities, and public transportation facilities.