Invinsa Fire Diabolo Each side of the diabolo is equipped with folded Kevlar which produces a good size flame. Comes complete with Handsticks and a length of Kevlar Diabolo string. Note: As this Diabolo is made of stainless steel, we recommend use over soft surfaces. NOTE: For professional use only, not a toy! Weight: 11.1 ounces (315 g). Length: 4.50 Inch (114 mm). Diameter: 4.75 Inch (121 mm)