Bonnel Springs Specifications:

High-Carbon Manganese Steel Wire, SWRH#72 A Grade.

Wire Diameter: 1.8-2.4mm. Height: 150-220mm.

Mid-Coil Diameter: 60-85mm.  5-7 Turns.

Border and Corner Dia.: 4.0-5.0mm. Helical Wire Dia.: 1.4-1.6mm.

Heat Treatment by computer, High Elasticity.

 

ISO 9001:2000, Compression Resistance 80000 Times.

Guarantee 10-12 Years.

OEM.