What factors can lead to labor insurance supplies different prices?

To the price of labor insurance supplies such as safety shoes, their prices are not the same, then what factors affect their prices? Basically has the following several aspects: first, labor insurance supplies products in different brand to the price; Second, labor insurance supplies different prices, different producing areas of different urban human cost and building cost; Three, import and domestic labor protection appliances for labor protection supplies different price; Four material quality affect the price of labor insurance supplies, labor insurance supplies production ( Raw materials with new materials and the reality of the time of material use, cost is large) ； Five, labor insurance supplies product quality influence prices ( Through the test of the labor insurance supplies product quality assured) ； Six, the merchant's business models lead to different prices (appliances for labor protection Wholesalers is lower than zero profit expectations, single product) ； Seven, labor insurance supplies business based on customer's demand quantity quotation is not the same; Eight, labor insurance supplies of enterprise nature and tax invoice price is different also.