This is the Elastic Shock Cord Pack
from the Pro Series II from Estes.
Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.
Elastic Shock Cord Pack
3 shock cords, cut to length, ready to use
Heavy duty elastic shock cords for your BIG rockets
Ideal shock cord for bigger rockets or a replacement should you
have the shock cord break on any of your Pro Series II rockets
Width: 1/2" (13mm)
Length: 96" (244cm)