Precision brass masses built for physics labs

The Premium Hooked Mass Set delivers nine polished brass weights spanning 10 g to 1,000 g, giving students a reliable, accurate set of known masses for force, motion, and measurement investigations. Each weight features a double-ended hooked rod through the center, so masses can hang from spring scales, pulley systems, and force meters — or stack directly on balance pans without any adapter.

Why Teachers Love It

• Double-Ended Hook Design – Hooks on both ends let students stack masses vertically, hang them from spring scales, or load them onto balance pans without swapping hardware — one set handles every common physics lab configuration.
• Polished Brass for Durability – Brass construction provides stable, corrosion-resistant masses that maintain accuracy through years of repeated classroom use.
• Organized Storage Block Included – The dedicated wooden storage block keeps every mass in its labeled slot, reducing lost pieces and keeping labs running smoothly.