Product Name: Medium Wall & Heavy Wall Tubing Model Number: HR (A) 2, HR (A) 3 Place of Origin: China Our medium wall & heavy wall tubing offers strong insulation, environmental sealing, and is resistant to impact and abrasion. It is designed for to seal and protect electrical components to cable joints and terminals. It also has a 3:1 shrink ratio, which allows it to easily fit over irregular shaped large connectors. HRA2, HRA3 are recommended for light cable and wire harnesses, that require waterproofing and connector protection.