Comparison : Item # 7521-10000, Delrin® 150 Natural Round Bar
Item # 7521-0125-3,
Item # 7521-2500-3, Delrin® 150 Natural Round Bar
Item # 7521-2500-6, Delrin® 150 Natural Round Bar
Item # 7521-2500-12, Delrin® 150 Natural Round Bar