The RollEase RGAL400H Clutch for 1-1/2 Inch Tube is for operating RollEase Skyline SL-Series SL30 roller shade systems. Moreover, the clutch gear mechanism operates using a bead chain loop. Furthermore, the clutch face measures 3-1/2 inches wide by 4-1/2 inches tall and fits into 1-1/2 Inch OD RollEase Tube RTEA4T12 / RTEA4T16. The Galaxy edition clutch has internal gears which allow for a more heavy duty clutch to carry more fabric shade weight than a standard use clutch. The RGAL400H clutch is also known as the SLG-400.