Instruction: Parse the product information to locate the target attribute, and then provide the extracted value of the target attribute and its source in the output, specifying None if the attribute is not present.

Input:
Product title: Husqvarna 240, 16 in. 38.2cc 2-Cycle Gas Chainsaw
Product description: Husqvarna 240 is ideal for jobs like pruning, lighter cutting tasks & hobby work. Easy to start & operate, thanks to built-in Husqvarna features like ergonomic design, facilitating technology & powerful x-torque engine with low emissions. Equipped with fuel pump & auto return stop switch for easier starting.
Product feature: X-torque - delivers lower fuel consumption and reduced exhaust emission levels in accordance with the worlds most stringent environmental regulations, Air injection - centrifugal air cleaning system removes larger Dust and debris Particles before reaching the air filter. This results in reduced air filter Cleanings and improved engine life, Combined choke/stop control - allows for easier starting and reduces the risk of engine flooding, Lowvib - system designed to reduce vibration levels to the operator, which lessens fatigue, Air Purge - removes air from carburetor and fuel system for easy starting, Choose a smaller chainsaw that is easier to maneuver if youre new to chainsaw work, A heavy chainsaw for beginners can be too heavy, making your arms and hands quickly tire, which can represent a safety risk, Wood types and size of trees will also impact your chainsaw choice, Choose a larger chainsaw with more power if you want to fell larger trees or hardwood, A chainsaw if too small will be subjected to great strain and unnecessary wear, Guide bar size is determined by tree size and to some extent by the level of your expertise, Experienced users should have access to at least two different guide bar lengths, Guide bar length should vary with different tree sizes, Shorter guide bars weighs less and are easier to maneuver when removing tree limbs, Longer guide bars are used for felling larger trees, Professional chainsaws provide maximum performance and optimal ergonomics, All-round chainsaws are built in the same way as pro-saws, but with a slightly lower performance, Consumer saws are small, easy-to-use and designed for home use by people who dont use their chainsaws very often, Tree care saws are designed specifically for professional arborists in tree care work, Delivers lower fuel consumption, Reduces exhaust emission levels, In accordance with the worlds most stringent environmental regulations, Centrifugal Air Cleaning System, Removes Larger Dust And Debris Particles From Reaching Air Filter, Reduces Air Filter Cleanings And Improves Engine Life, System design reduces vibration levels, Lessens operator fatigue, Combined start/stop switch, Smart start and fuel pump make the saw very easy to start
Product price: $7.88
Product brand: Husqvarna
Target attributes: Bar Length
Answer: attribute: bar length
value: 16 in.
source: product title