Hi, Dear
I am Chinese and live in China now. Now I am working for one US company, we use English for our daily work, I can write, communicate with English fluently.
I fully understand your request is for weight plate casings, not for the finally product.
As you may know, Alibaba is a large B2B platform which contains many product like your request.
I research the product you provide in Alibaba and finally I found one supplier can provide you the weight plate casings.
it have 4 size for you: 2.5kg/5kg/7.5kg/10kg, also I check the price for you: 2.5KG 4.2CNY 5.5KG 5.5CNY 7.5KG 8CNY 10KG 11CNY(Including the tax, if you don't need invoice, you can get 7% back).
it need order more than 1,000 units(for each size, not the summary amount) at one deal at least.
the weight for one unit is about 200-450g, if you want to ship by sea, it won't take too much.
I am good at product searching, price compare, negotiate the purchase price with the seller or factory in Alibaba. As I am native Chinese, I can talk the seller and factory owner in Alibaba directly without any mistake. And I am working in the same time zone with them, I can get the response quickly. if you want to order more units, I can negotiate the purchase price for you.
Also I am working with many shipping agency, and can get the cheaper and faster shipping service from them. Just give me the list of goods and your expect price for product and shipping.
Looking forward for your reply.
Best Regards
Kevin