Thanks for your kindly order on alibaba. For non-standard products, we make 3d drawing for each customer. And we make production after customer confirm the details drawing. We have sent 3d drawing, and they confirmed, but after they get goods, they said they need total length, not for the effective length.If all customer not confirm with our drawing. Then how a 3d drawing going? If so, how can we make right products for each customer. Alibaba is fair. They checked the 3D drawings we sent to the customer and compared them with the physical drawings the customer received, and they were completely consistent. Therefore, Alibaba not favor any party and only make judgments based on facts.