Description Buying Guides Endcap Kits are used on J250-Frame breaker to connect busbar or similar electrical connections. Includes Hardware. Buying Guides Buying Guides Related Products XT4NU4250CFF000XXX Add To Cart XT5HU350BMFF000XXX Add To Cart XT6NU3800FFF000XXX Add To Cart XT5HU430ACFF000XXX Add To Cart XT6NU3800GFF000XXX Add To Cart