The Eerder rear light bracket is exactly tailored to fit the aluminium Son rear light exactly matches the countour of it. It also fits the Busch und Müller rear light called Toplight S which shares the internals with the Son. This more affordable plastic housing has slightly bigger ears so won't fit as perfectly as the SON, but still pretty nice. This is also the light which is shown on the photos.

Other versions, for other bikes than the Brompton G line, like the Righty and the Swivel type can be found here.

Specs:

• Material: 304 stainless steel in 2 or 3mm thickness machine tumbled
• or 3mm thick Aluminium 5083 (highly corrosion resistant) dark grey RAW machine tumbled
• 50 mm hole distance of the M5 threaded holes (no nuts needed) and a 6.2 mm mount hole for attaching it to your frame with either M5 or M6
• A2 stainless steel M5x8 flat head countersunk allen screws included
• Weight: 5-19 gram (screws 3 gram) depending on the version