Comparison : Item # C6500-1750-48-2, Nylon 6 FDA Natural
Item # C6500-1750-48-2.5, Nylon 6 FDA Natural
Item # C6500-1750-48-3, Nylon 6 FDA Natural
Item # C6500-1750-48-3.5, Nylon 6 FDA Natural
Item # C6500-1750-48-4, Nylon 6 FDA Natural