ADC Model 171-R curtain track is identical to ADC Model 170 except it employs No. 1749 Neoprene Ball-Bearing Single Carriers and No. 1750 Neoprene Ball-Bearing Master Carriers, which provide quieter operation and an easy to pull operating cord. These carriers are used in place of the standard No.1701 and No. 1702 standard polyethylene carriers. 

The ADC 171-R series is also available with a black finish (271-R) at additional cost.