C.S. Osborne #40 Monofilament Thread
A clear nylon thread. Blends in with fabric being sewn and is very strong.
#40 Thread is used for general upholstery work, canvas, etc.
1-1/2 lb put-up. 33 Gauge. 3-1/2 lb Breaking Strength. 10.600 Yards Per Roll.
C.S. Osborne # 4705-40