Carbon steel extension tension spring

NO 1:
wire diameter(d)=2mm
outer diameter(D)=18mm
length(L)=140mm

NO 2:
wire diameter(d)=2mm
outer diameter(D)=20mm
length(L)=100mm

NO 3:
wire diameter(d)=2mm
outer diameter(D)=29mm
length(L)=108mm

NO 4:
wire diameter(d)=2.3mm
outer diameter(D)=25mm
length(L)=88mm







