Smoke Machine Leak Detector Exhaust Intake Boot Cone Adapter to Ancel S300 S3000. ANCEL Soft Rubber Plugs are used to test the performance of automotive sealed tube systems. It is suitable for use with all AUTOOL Smoke Leak Testers such as the ANCEL S100, S100, S200,S300,S1000,S3000, L100, L300, etc.