Testboy 50 – Quick Tester for Brake Fluid DOT 4

The Testboy 50 is a compact and reliable testing pin for quickly checking DOT 4 brake fluids. With five LEDs indicating water content, it offers fast and precise diagnostics for glycol-based brake fluids—ideal for quick inspections in automotive workshops. Its illuminated probes, durable design, and resistance to acids and alkalis ensure long-lasting performance.