COMPATIBLE WITH SPACERAIL SETS: Designed to work with Spacerail marble run roller coaster kits using standard 1/2 inch steel balls
VALUE 8-PACK SUPPLY: Includes eight replacement balls to keep your build running continuously without interruptions
SMOOTH, HIGH-SPEED PERFORMANCE: Precision-polished for low friction and consistent rolling through tracks, loops, and drops
DURABLE STEEL CONSTRUCTION: Made from high-quality metal that resists wear, dents, and corrosion during repeated use
MULTI-USE FUNCTIONALITY: Suitable for other marble runs, STEM experiments, physics demonstrations, and DIY builds
PRECISION SIZING: Each ball bearing measures exactly 1/2 inch in diameter for consistent size and weight, ensuring stable movement through your track system
REPLACEMENT AND EXPANSION SET: Allows you to replace missing pieces or add extras to extend the life of your marble run without replacing the entire kit
Overview
Brand : Generic
Material : Alloy Steel
Item dimensions L x W x H : 0.5 x 0.5 x 0.5 inches
