Uses:This shock tube(fire cracker) can be used for transmitting detonating-wave of slow speed and low energy and initiating shock tube detonator. It has a good characteristic of antistatic and stray current. It is safe, simple and reliable in operation. Main parameters: Outer diameter (mm):3.0 inner diameters (mm):1.4Performances: Initiating speed(m/s):1650±50,1750±50,1850+50,1950+50 Stretch resistance: 9.8N at -40, 68N at 25,49N at 50. Shock resistance: it can not be initiated by the shock function of Kast drop hammer weight 10kg, falling from height of 150cm. Fire resistance: it cannot be initiated by flame. Initiating sensitivity: a single No.8 detonator will initiate 30 shock tubes Propagating property: its propagating property is reliable at -40 50. After functioning, the color of the outer surface of the tube should have obvious change, so that its easy to check propagating network. Note: take care in handling, prohibit to be impacted violently. Sealing the mouth of shock tube to prevent from water. The end of shock tube should be cut in good order and connected tightly in connector during network connection. Storage: to be stored in a ventilating and dry storehouse under the original package condition.Shelf-life:5 years.Packing: outside: paper box or wooden box Inside: plastic bag List of packing Name of product number External dimensions(mm) Gross weight(kg) Ordinary shock tube m/roll m/roll Wooden box carton Wooden box carton 500 2000 605*350*315 560*340*280 18 14