Shenzhen Wenxin Meijia Household Products Co., Ltd. 

https://www.alibaba.com/product-detail/4Inch-Heavy-Duty-90-Degree-Iron_1601495419789.html?spm=a2700.prosearch.normal_offer.d_title.2a6467afWspONm&selectedCarrierCode=SEMI_MANAGED_STANDARD%40%40STANDARD&priceId=b6e834cbf5b54c818a5390ee30d72e33  

Now it won't let me go past 300 units. When I ordered, it allowed me to see pricing for 500 and what I found was that at 480 the shipping was about $170, but then at 490 the shipping jumped to $300.  I can ony assume they had a 500 piece inventory count in the system and that's why its stopping at 300. 

It's April 15, and theys are being quoted in 2 to 4 weeks for 0.41 each. Slow boat is quoted at 0.17each.