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666-D7 Dimensions: I.D. = 0.335" / 8.51mm opening that wraps around the sides of the cartridge. face(front) = straight / vertical Shaft = 0.435" / 11mm
614 series Dimensions: I.D. = 0.321" / 8.15mm opening that wraps around the sides of the cartridge. face(front) = beveled Shaft = 0.312" / 7.9mm