Steel Balls for DIY Physics Space Ball Roller Coaster (10pcs-Set)

Steel Balls for DIY Physics Space Ball Roller Coaster (10pcs-Set)

US$ 6.93 Free worldwide shipping!
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Steel Balls for DIY Physics Space Ball Roller Coaster Features Brand New Steel Balls for DIY Physics Space Ball Roller Coaster Replacement part for DIY Physics Space Ball Roller Coaster Made for high quality Steel material Suitable for 1-8 grade Physics Space Ball Roller Coaster Steel Balls for DIY Physics Space Ball Roller Coaster Specifications Dimensions: 12.712.712.7mm Weight: 90.0 g Steel Balls for DIY Physics Space Ball Roller Coaster Package Included 10x Steel Balls