21.19 uses headphone jack connections, which allow the pendants to be “plugged into” the canopy for fast and easy installation. Pendant lengths are pre-set during production and are not site adjustable. Clients must specify the shortest and longest lengths when ordering. The pendants come standard with 10' / 3 m of coaxial cable. Additional cable lengths are available in increments of 10' / 3 m, up to a maximum of 120' / 36 m in special applications.