This is for 1 Carb Float Level Tool. Specially machined brass fitting with Viton O-ring and Clear fuel line attached. For setting fuel service level (float level). Fits Suzuki GS550,650 and 850 from 1980-83 with Mikuni BS Carbs and the 6mm x.75 drain screw shown in picture. Comes with instruction sheet. Will combine shipping for orders of more than 1. ***Note : With 2 fittings you can check two carbs at once etc.... Thanks for looking