Skywatcher Extension Tube For Skywatcher Tripod
215mm mount extension (supplied with AZ5 & GTi Alt-Az mount/tripod bundles). 
Constructed from cast aluminium. 215mm overall length. Base and top platform diameter 70mm. Female 3/8" thread on base. Male threaded 3/8" screw connector on top platform (top platform separable from main body).
Recommended Accessories For Skywatcher AZ-GTi Mount and the Star Adventurer Tripod To Use On Low Latitude.