Dimensions: 1.5 by 1.5 in. (38 by 38 mm)
cross-section with 3 in. (75 mm) minimum length with 1⁄8 in. (3 mm) radius corners.
Material: Aluminum with a smooth finish.
Horizontal Spacing Probe
ASTM F406-22
Standard Consumer Safety Specification for Non-Full-Size Baby Cribs/Play Yards