Currently, the KNEX rod and connector systems are marketed in two size categories, a “standard” size, directed to both children and adults, and a larger size, directed more to younger, smaller children, which has larger and softer components, {TAIL ~ both rods} and {HEAD ~ connectors} 
Currently , the KNEX rod and connector systems are marketed in two size categories , a “ standard ” size , directed to both children and adults , and a larger size , directed more to younger , smaller children , which has larger and softer components , { TAIL ~ both rods } and { HEAD ~ connectors }
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