Three different bases, one for 1/8th scale truck carbs, one for HPI truck carbs and one for the Traxxas Nitro T-Maxx carb and other carbs with the same diameter. Rubber construction. Black in color.

INCLUDES: One 90 degree base with a thin inside ring for most 1/8th scale carbs Length: 39.5mm (1.55") Inside diameter: 12.5mm (0.49") One 90 degree base with a thick inside ring for HPI truck carbs Length: 39.5mm (1.55") Inside diameter: 14mm (0.55") One 60 degree base for 2.5cc Traxxas and some other 18th scale carbs Length: 45mm (1.77") Inside diameter: 14mm (0.55")