Quality Construction Made with durable PC (polycarbonate) and silicone materials for longlasting performance. PC material offers impact resistance and heat tolerance, ensuring no cracks or deformation even in demanding automotive environments. Silicone components create a secure, leakproof seal during use, preventing coolant leakage and guaranteeing accurate test results. Universal Compatibility Hose length: 5.32 inches; diameter: 0.43 inches. Main body: 0.66 inches thick, 3.93 inches tall; head section: 1.77 inches wide. Fits most vehicle types, including sedans, SUVs, trucks, and vans. Compatible with all common coolant types for versatile use across different automotive cooling systems. Simple and Fast Operation Step 1: Locate your vehicle's coolant reservoir. Step 2: Insert the tester's hose into the reservoir. Step 3: Squeeze and release the spherical bulb to draw coolant into the tester until it reaches the marked fill line. Step 4: The dial pointer will show the coolant's freezing point as the temperature changes, allowing quick and easy condition checks. Accurate Performance Designed for precise measurement of antifreeze concentration and coolant freezing point. Enables prompt evaluation of freeze protection levels so you can take timely measures to prevent coldweather engine damage. Ensures reliable engine operation and protection in harsh conditions. Practical Applications Routine vehicle maintenance checks in home garages to prevent costly engine repairs. Professional automotive service in shops for accurate and efficient coolant diagnostics. Ontheroad condition checks for fleet vehicles, ensuring engines are safeguarded across varying climates.