On Sep. 25th, 2020, we received an inquiry about the custom constant force spring, the rough dimensions is 1530*2.0*0.15 mm (L * W* T), our clients said they have asked other Chinese suppliers have made the tooling but the quality from their company is not good, so he asked for some samples from us and after 10 days testing our product quality has been approved 100% perfect, so we made 3,000 pcs for the first order and shipped by DHL to USA. After two months, we received an order of 30,000 pcs of constant force spring again. Now our product quality has been recognized by some of our customers, which is a good news to us.