Compatible for systems* between 35 – 100lbs (15.9 – 45.4 kg) Systems include all weight below the vibration isolator, including column, projector mount and projector Average weights of common mounts include: RPAU (4 lbs or 1.8 kg), RPMAU (5 lbs or 2.3 kg), and VCMU (33 lbs or 15 kg). Average weight of CMS columns under 12” in length are 1 lb (0.5 kg) or less. Compatible with Chief CMS columns (1.5” NPT) Connects two extension columns; patented design isolates vibration transmitted to lower column to reduce image movement