Insulates battery terminals which have in-line dual posts. Suitable for top-mount, dual-post marine batteries. Meets requirements of ABYC Small Craft Section E-9, USCG 33 Subpart I, and ISO 10133 for preventing accidental grounding of battery terminals. Secure with cable tie (cable tie not included). Suitable for use in environments up to 105°C. Includes one black and one red insulator.