1. the wire diameter: from 2.7mm to 5 mm

2. the raw material: oiled and tempered alloy steel wire

3. types: 16 kinds

4. Applied Model of engine: D28,DB58/33, D1146,DE12,DE12TIS, DE08TIS,DV15TIS, DL08,DV11,DL06.

5 we can provide 3-5 samples for your test for free but the freight to be paid by customer

ENGINE VALVE SPRING