Frey Scientific 590544 1 in. Drilled Lead Physics Balls FeaturesDrilled Lead Physics BallsLead ball for demonstrating physics of force and motionDrilled surface for mountingSize is 1 inches in diameterAn ideal supply for use in any science curriculum or laboratory settingSpecificationsSize: 1"Country of Origin: IndiaGrade Level: Middle-High SchoolSafety: Choking Hazard - Small Parts.
2 lbs It is comprised of solid, closed cell foam and is covered with heat sealed, wipe clean vinyl. Wheelchair Leveling Pad; Vinyl Cover SpecificationsColor: Vinyl CoverSize: 18" x 16"Dimension: 1.