Certification : RoHSDIY Supplies : MetalworkingMaterial : Stainless steelStyle : COILis_customized : YesUsage : IndustrialModel Number : 0.4mmLoad Type : CompressionModel Number : 0.4*3/4//5/6*L mm10-20pcs/lot 0.4mm stainless steel compression springsize: length 5/10/15/20/25/30/35/40/45/50mmwire diameter 0.4mmouter diameter 3mm/4mm/5mm/6mmThe items will be sent to you address, please make sure you address is correct.We sincerely provide good product and best service,so if you are satisfied us,please leave you positive feedback,coustomers satisfaction and supportive is our best return.If there is anything that you are not satisfied with our items,please let us know so we can solve the problem,please do not leave a negetive feedback,thank you so much.Thank you visiting our store.we have white and black nylon plastic hex nut,which colour do you need ,plaease leave me a message.