is it true that each roller has different size motors depending on size of the Roller ?
e.g. Roller Shades 20, have 1.25 in. diameter of tube size and Roller Shades 100 have 2.56 in. diameter tube size.
so, is it true that the motor's size of Roller Shades 20 and Roller Shade 100 is different or same ? can i use the motor on Roller Shades 20 for Roller Shades 100 ?
[Sorry for my bad English]