Aero-Motive Heavy Duty I-Beam Balancer Trolley, P/N: AER-BT34IWFeatures: - Quiet operation & long-lasting performance, with polyurethane wheels on either 4" I-beam or 3 1/4" patented rail - Insulated trolleys are safeguarded from electrical charges, with suspended load electrically insulated from the support beam aboveSpecifications: - Capacity: 300 lbs. (136 kg) - Insulated Trolley for 4" I-Beam - Polyurethane Wheels1301790406 4/15(20LBS) H 6" L 12" W 8" Product available at Amazon.com and BrakeProducts.com
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