Specifications: 1) Material: 840D nylon core with PVC coating to both sides 2) Dimensions: 0.085mm thick overall 3) Capacity: a) 3 tons: 560mm (22") lift b) 4 tons: 780mm (30") lift 4) Weight: a) 3 tons: 2.0kg b) 4 tons: 2.6kg 5) Warranty: 6 months no-fuss warranty Features: 1) Will safely lift your vehicle up out of a rut or bog in seconds 2) Simple to use without the risk of damage to your vehicle as can happen with a high lift jack 3) An essential piece of equipment which you need to always have in your vehicle for emergencies Safety precautions: 1) Never allow any part of your body to be under the vehicle when it is supported only by the exhaust jack 2) Be aware that vehicle's exhaust fumes are poisonous if inhaled in large quantities. Therefore do not use the exhaust jack in a confined area and always turn off engine when not inflating the jack 3) Always chock both front and rear wheels opposite to the side under which the jack is being used and apply the handbrake 4) When placing the exhaust jack under the vehicle, ensure the bag is away from hot or sharp underbody pares and clear away sharp sticks from the ground 5) It is essential to use the protective mats provided to help to prevent puncturing the bag 6) Do not over-inflate the bag, 90% capacity is ample