This accessory set includes almost everything required to be used with Air Track (B8R06433). 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.
