I'm on the picture of goods, marked with detailed dimensions of the parts, so before buying, be sure to carefully compare the size before you buy. important hint: in the time of purchase, must be in the remarks column on the order clearly states that the specific size you need, it is very important, otherwise, we can not press you need to configure the size of the number, only randomly selected size shipments, you may receive unsuitable size number. $ 10.9 purchase order, you can number in the following size number, choose 12 sizes number. Currently, there are the following number sizes are available: 10-12.5-15- 17.5-20-22.5-25-27.5-30-32.5-35-37.5 40- 42.5- 45- 47.5- 50- 52.5- 55- 57.5- 60- 62.5- 65 If you do not select the size, I will send the goods in accordance with the default configuration. The default configuration size is: 10 - 12.5 - 15 - 17.5 - 20 - 22.5 - 25 - 27.5 - 30 - 32.5 - 35 - 37.5,one each. Main jet flow above specifications may optionally 12, as a combination, a combination of 12 main jet price is $ 10.9. If you buy two or more than two or a combination, you can also get 15% discount. If the number of wholesale more, and I also can re-negotiate the price.