C.S. Osborne #52 Monofilament Thread
A clear nylon thread. Blends in with fabric being sewn and is very strong.
#52 Thread is an extra heavy duty thread for heavy fabric, canvas, etc.
1-1/2 lb put-up. 32 Gauge. 7-1/2 lb Breaking Strength. 9,600 Yards Per Roll.
C.S. Osborne # 4705-52