Cando Foam Roller - Black Composite - Extra Firm - 6 X 36 - Round. Molded Composite Foam Rollers Are Perfect For Positioning Balance Postural And Muscle Re-education Spinal Stabilization Body Awareness And Coordination And Ranging And Strengthening Activities. Round Rollers Offer Progressive Exercise Sequences - User Can Graduate From An Easier (smaller Diameter) To A More Difficult (larger Diameter) Roller. Half Round Roller Is A Great Tool For Ankle Stretching And Knee Rehabilitation. Diameter Refers To The Width Of The Half-round Profile. The Molded Rollers Are Strong Enough To Be Used By Large Adults And Active Children. Foam Rollers Are Available In 36 18 And 12 Lengths With Either A Round (circular) Or Half-round (semi-circular) Profile. Foam Rollers Are Available In 36 18 And 12 Lengths With Either A Round (circular) Or Half-round (semi-circular) Profile. This Line Of Rollers Is Available In Black. The Molded Composite Foam Rollers Are More Firm Than The Polyethylene Roller And Are Rugged. Dimensions: 6 X 6 X 36 . Weight: 2.0 Lbs.