Wave Dental Carbide Burs For High Speed Handpiece 1.6mm FG 1957 1958 PRIMA. Brand: WAVE DENTAL (Joint venture company of PRIMA DENTAL UK). Dental Tungsten carbide burs. Midwest Friction Grip Carbide Burs. For High Speed Handpiece. FG Straight Fissure Head With Rounded End. Overall length: 19.0mm. Shank Diameter: 1.6mm. FG 1957 (Head diameter: 1.0mm ; Head length: 3.7mm). FG 1958 (Head diameter: 1.2mm ; Head length: 3.7mm). The sale of this item may be subject to regulation by the U. Food and Drug Administration and state and local regulatory agencies. City State: Zhengzhou, Henan China.