Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Exervo Nimbus EnduraBead Pro High Density Foam Roller 36" x 6" Half Round, Black
Product description: If you need a foam roller that will not go out of round and provide very firm, focused massage pressure then consider Nimbus EnduraBeadTM foam roller. Sports teams, track & field athletes, runners and cyclists prefer the very firm massage pressure this roller offers. The Nimbus is also a strong and firm surface for pilates and other weight bearing exercises. Instead of an extruded roller made of foam cells that will eventually break down, the Nimbus heat molded construction stays perfectly round even after very high use by heavy users. Nimbus EnduraBeadTM rollers are made in the U.S. from 100% polyethylene beads- the most ideal material for foam rollers. Our rollers are amongst the most durable foam rollers on the market today. This roller is rated Level 5 - it's extra firm with little give at the surface. Recommended for users who need a well constructed high density foam roller that holds up to demanding & frequent workouts. This is a half foam roller- a full 36" long roller cut in half along the length.
Product feature: 5 year warranty- made in USA. Precision crafted, heat molded high performance foam for exceptional durability100% polyethylene EnduraBead molded bead construction. Will not go out of round, Nefitco Firmness Scale: Extra Firm, Level 5 half foam roller for focused, highly stable massage pressure. Measures 36"L x 6" half round, Look for the Nefitco exclusive Exervo brand for authentic EnduraBead rollers, Recommended for users needing very firm and deep massage pressure. Commercial grade., Supplier to sports teams, schools, therapists, chiropractors & individuals. Veteran owned business
Product brand: Exervo
Target attributes: Length
Answer: attribute: length
value: 36" long
source: product description
attribute: length
value: 36"
source: product feature
attribute: length
value: 36"
source: product title