Essential replacement parts for your mechanical wave investigations.

• 40 grams of replacement blue sand for chladni plates
• 0.5 mm thick×1 meter long string for demonstrating standing waves
• Replacement spring has 0.75 mm thick wire, and measures 30 mm diameter×60 mm length (compressed)

Strings snap, springs deform, and sand gets swept into the garbage can. Keep your mechanical wave demonstrations ready to go with these high-quality replacement parts.