Bellanco straight battery-terminal insulator with a nominal 16mm cable entry for heavy-gauge battery connections. The published catalogue reference identifies IN31-9 for 00 B&S cable (approximately 2/0 AWG); select red or black and verify fit against the actual cable outside diameter and terminal before installation.
MPNs: IN31-9RD (Red), IN31-9BK (Black)
Also known as: battery terminal boot, battery post cover, straight terminal insulator, battery cable protector.