I designed the oil-less bush holder for my printer "Kid Mendel".
The oil-less bush's dimensions are as follows,
ID : 8 mm
OD : 12 mm
L : 15 mm
It seems like called 081215 as a model number.
The oil-less bush is cheaper than lm8uu bearing and the weight is lighter also.
It shows low noise, smooth and light movement without any lubricating oil.
The distance between the holes of the holder's flange is 24 mm.
The center height is 9 mm.