ITEM NAME:22.5+7CM Mechanics Cylinder Stethoscope Car Engine Block Diagnostic Auto ToS Ew Feature Quality chromed-steel construction with soft PVC hose and probe Detectable frequency range: 10HZ-10KHZ Anti-shocked design Material: Rubber & Plastic & Stainless Steel Probe Length: Approx. 22.5cm + 7cm 8.8''+ 2.7'' Probe Diameter: Approx. 0.3cm 0.1'' Please kindly undertsand that slight color difference may exsit due to phtotgraphing.1x Stethoscope Car Engine Block Diagnostic tool. Probe Length: Approx. 22.5cm + 7cm 8.8"+ 2.7". Material: Rubber & Plastic & Stainless Steel.