The spiral series of cup wheels from Syntec Diamond Tools is available in a variety of sizes, grits, and segments.  The yellow and green series vary slightly by diamond size, but are both available in 4.5" and 5" threaded and non-threaded variants.

Spiral Cup Wheels - Yellow Series

SCSCT1115-9: 4.5", 9 seg, 5/8-7/8 arbor, yellow

SCSCT1115-9T: 4.5", 9 seg, threaded, yellow

SCSCT1115-18: 4.5", 18 seg, 5/8-7/8 arbor, yellow

SCSCT1115-18T: 4.5", 18 seg, threaded, yellow

SCSCT1100-8:4", 8 seg, 5/8-7/8 arbor, yellow

SCSCT1100-16: 4", 16 seg, 5/8-7/8 arbor, yellow

SCSCT1125-18T: 5", 18 seg, 5/8-7/8, threaded, yellow

Spiral Cup Wheels - Green Series

SCSCT3115-9: 4.5", 9 seg, 5/8-7/8 arbor, green

SCSCT3115-9T: 4.5", 9 seg, threaded, green

SCSCT3115-18: 4.5", 18 seg, 5/8-7/8 arbor, green

SCSCT3115-18T: 4.5", 18 seg, threaded, green

SCSCT3125-9T: 5", 9 seg, 5/8-7/8, threaded, green