Science › PITH BALLS - ASSORTED SIZES (PACK OF 10) Image 1 of 1 PITH BALLS - ASSORTED SIZES (PACK OF 10) $2.20 Code: AR1080400 Add To Cart Added! Code: AR1080400 Available as spare for Pith Ball Electroscope (Code: AR1080380). In assorted sizes. You Might Also Like Quick View SIMPLE ELECTROSTATICS KIT - PSSC $63.80 Quick View ELECTROSCOPE - PITH RAIL $12.80 Quick View VAN DE GRAAFF ACCESSORIES - SET OF 7 $194.00 Quick View ELECTROSTATIC PITH BALLS - CONDUCTIVE COATING (PACK OF 10) $10.65 Quick View ELECTROSTATICS KIT $82.00