The UL 1989 UL 1418 Impact Test Ball is a 2-inch steel sphere that weighs 535 grams

The UL 1989 UL 1418 Impact Test Ball is a 2-inch steel sphere that weighs 535 grams.

Specification:
Weight: 535 grams / 1.18 pounds
Diameter: 50.8 mm / 2 inches Diameter

The Impact Test Ball is a specially processed ball used to test impact resistance according to international standards. It is made of chrome plated steel for durability and has holes to facilitate pendulum testing.

According to UL1989, UL1418 and other.

The point of suspension is one inch (25.4 mm) in front of he panel, h is 16.25 inches (412.8 mm). the diameter of the steel sphere is 2 inches (50.8 mm). and the mass of the steel sphere is 1.18 lbs (0.535 kg mass) and it is to hbe released from rest.

Standard:
UL 1989 “Valve Regulated or Vented Batteries with Aqueous Electrolytes”
UL 1418 “Implosion-Protected Cathode-Ray Tubes, for Television-Type Appliances”