Wire diameter ends up to 0.8mm are squared and unground. Wire diameter ends 1.00mm and over are squared and ground. Manufactured with a right hand helix
Outside Diameter = 7.3mm
Wire Diameter = 1mm
Free Length = 30.5mm
Minimum Working Length = 19.9mm
Load at Minimum Working Length = 34.13N
Material = Steel Alloy
Spring Rate = 3.26N/mm
Ends = Closed (Square)/Ground