These reproduction Betor piggy back gas shocks fit 1977-79 Pursang 250cc & 370cc models as well as 1977 Frontera 370cc 78-79 Frontera 250cc & 370cc models. They come in 380mm or about 15" length with 12mm mounting eyelet holes but 10mm mounting bushings is also included. They come with black bodies, black upper spring and silver lower spring.