The HealthOMeter 55070 150 Lb. Counterweights for Balance Beam Scale were designed to be used with HealthOMeter Physician Beam Scale Models 400KL, 402KL, and 402LB. THE COUNTERWEIGHT IS ONLY COMPATABLE WITH THE 400KL, 402 KL, and 402 LB WITH CAPACITY OF 350 lbs. The counterweights increase the scales capacities from 350 lb to 450 lb simply by hooking on to the poise bar.
