This accessory set includes almost everything required to be used with Air Track (B8H25339). This set consists of the following parts including the magnets useful for precision collision & non-collision study; these give better results than hook and loop attachment and spring set.

• Bolt & Wing Nuts x 10
• Spring Attachments x 4
• Springs x 4
• Hook & Loop Attachment Pairs x 2 Pair
• Pulley x 1
• String x 2
• Slotted Mass & Hanger: Weights 5 g - 4 pcs. & Hanger 5 g x 1
• Photogate Flags x 8
• Photogate Arms x 2
• Launching Cradle x 1
• Assorted Masses x 8
• Risers x 8
• Rubber Bands x 2
• Hook for Spring x 1
• Pins x 4