
Koyo CR-16 Track Roller, Standard Stud, Unsealed/Slotted, Inch, Steel, 1 Roller Diameter, 0.625 Roller Width, 1 Stud Length, 7/16 Thread Size, 1-21/32 Overall Length, 0.438 Stud Diameter 
Koyo CRSB-12 Track Roller, Standard Stud, Sealed/Hex Hole, Inch, Steel, 3/4 Roller Diameter, 0.500 Roller Width, 7/8 Stud Length, 3/8 Thread Size, 1-13/32 Overall Length, 0.375 Stud Diameter