How to choose feeder rings?

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{"product_page":{"price":"#content .product-price-container","special":"#content .product-special-container","price_parent":"","quantity":"#product input[name=quantity]","button_minus":".us-product-right .us-product-quantity-btn:nth-of-type(1)","button_plus":".us-product-right .us-product-quantity-btn:nth-of-type(2)","button":"#product #button-cart","product_data":"#content #product"},"list":""}

{"symbol_left":"","symbol_right":" \u0433\u0440\u043d","decimal_place":"2","decimal_point":".","thousand_point":" "}

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