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: FrankeUSA UDSK900-18 Double Bowl Stainless Steel 31.5x17.5in. Undermount Sink
Product description: UDSK900-18 Features: -Double undermount kitchen sink. -Large, deep bowls with extra deep ledges. -Sound deadening pads. -Easy to clean. -Easy installation. -18 Gauge stainless steel construction. Installation Type: -Undermount. Finish: -Silk. Material: -Stainless steel. Number of Basins: -2. Sink Shape: -Rectangular. Number of Faucet Holes: -0. Commercial Use: -Yes. Dimensions: Overall Sink Depth - Top to Bottom: -9". Overall Length - Side to Side: -32". Overall Width - Front to Back: -18". Overall Product Weight: -30 lbs., The FrankeUSA UDSK900-18 31.5x17.5in. Under mount Sink is made of 18 gauge stainless steel. This is a double bowl sink. FrankeUSA Sinks are known for their superior patented no-welding production techniques, high quality, and ease of install. This sink features a radiant silk rim and bowl finish. The drains are located in the rear of the bowls. This FrankeUSA sink has sound deadening pads which provide ultra-quiet insulation from excess noise and vibrations. The minimum cabinet size for this sink is 36". Our Safe-T rims protect you from sharp edges during installation and adds strength to the sink!
Product feature: N/A, Imported, Two equal size bowls measure 15 3/8 inches x 14 1/8 inches x 9 inches each, Large deep bowls gives you the needed capacity to tackle any cooking or cleaning task, 18 gauge stainless steel construction for under mount installation, Under mount installations for solid surface countertops Professional installation recommended for this application Template and hardware included, Limited Lifetime Warranty
Product brand: FrankeUSA
Target attributes: Material
Answer: attribute: material
value: stainless steel
source: product feature
attribute: material
value: stainless steel
source: product description
attribute: material
value: stainless steel
source: product title