Comparison : Item # 6026-1300, 30% Glass-filled Nylon 6/6
Item # 6126-1700, 30% Glass-filled Nylon 6/6
Item # 6126-1900, 30% Glass-filled Nylon 6/6
Item # 6126-2300, 30% Glass-filled Nylon 6/6
Item # 6126-2700, 30% Glass-filled Nylon 6/6