The full stainless steel #Seatposthugger Model 6 is based on the Full metal Bracket and has the same proven length as the Seatposthugger Model 4 series. Which means it's suitable for all saddle positions, low and high, so for all people short to tall
The seatposthugger is a luggage carrier which is designed to hold the Brompton front carrier block and clamps onto your Brompton 31.8mm seatpost. It's compaitble with the luggage frames of Brompton (supplied with their bags) and most copies (not all) made by other brands like Trigo.
Specs:
The Model 6 can be adjusted to slide freely by opening the Quick release clamp and loosing the brass wing nut at the bottom to get the desired smooth sliding. This wing nut is meant to be used for clamping and also to improve the torsional stiffness (only desireable for heaver loads, so not always needs to be tight) During installation you might need to re-adjust the Quick release depending on the exact diameter and condition of your seatpost.
Installing the Seatposthugger Model 6
So in case you have a standard or extended (60 mm longer plain) seatpost you just remove the saddle and slide the Seatposthugger onto the post.
Happy riding!