as per Tappy T – 815 standard to determine the coefficients of friction between film to film, film to metal and film to glass. Specification: Speed : 1.5º to 2.0º / second.Weight of the sled: 750 grams. Size of sled : 4 inch X 2 inch. Accessories : 2 nos. of S.S templates. Paint : Powder coated. Power : 230 Volts, 50Hz, single phase.