TheBall Marble Wall Run Straight Connectors, 6 Piecesare usedTo connect the hoses of the marble run sets to create longer runs. Ball runs are a fascinating way for children to have fun building and experimenting. The Ball Run Peg Board is easy to assemble at any time to create new challenges, and helps children learn about the lawsof physics through play. By trying different things, they learn about slopes, distance, speed, gravity & weight and how they all work together.Weight: 1 lbs. Lime green colored silicone. 3″L x 2″Dia. 1 lbs. Set of 6 Five year warranty Made in Germany. Ball/Marble Run Components (Sold Separately): 208286- 4 Wall Strips 208283- 20 Loop Attachments 120256- Plastic Tube 208407- 8 Plastic Tubes 208314- 6 Straight Connectors 208097- 3 Y-Shaped Connectors 208401- Small Peg Board 208403- Large Peg Board 351317- Wooden Ball Mix 6-Piece Set (red & blue) – 1.5″ 120264- Wooden Balls Mix 6-Piece Set (colored) – 2″ *** HABA is custom produced, no cancelationsor modifications allowed.Lead time is 12-14 weeks.