D Model: Frame HM Graphite/Nanometric/Tungsten.Shaft, HM Graphite/Namd. Stiff. Racket 10 mm longer.Weight, 4U, average 83 grams, G4. Colour, Ruby Red. S Model: Frame HM Graphite/Nanometric/Tungsen. Shaft, HM Graphite/Namd. Stiff. Racket 5 mm longer.Weight, 4U, Average 83 grams, G4. Colour, Emerald Green.