Can you help me identify these parts?

Hi ... I am in need of all these pieces pictured. The only part I see a number on is the coil balance. I see the related parts that are used together but on the coil cover I believe it's called there is a narrow and a wide to choose from. If they both work with the 170 series coil why is there a narrow and a wide? How can I figure out which one I need? Please send a list of the parts I need that I should purchase. Thanks so much!