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All plastic frames.
Brass, plated.
Brass, with ring on top
Aluminium tubular balance, with zero adjustment. Scales are both in grams and Newton. With upper & lower suspension hooks, graduation on inner tube.
The Equal Mass Metal Cylinder Set includes Aluminum, Copper, Brass, Tin and Zinc. Each Cylinder measures ½” in diameter and has the same mass, 20 gm.
