http://www.impexindustry.com/index.php?route=product/product&product_id=518 http://www.impexindustry.com/image/data/logo.png http://www.impexindustry.com/index.php?route=product/product&product_id=518 Impex Industry http://www.impexindustry.com/index.php?route=product/product&product_id=518 Fig. 4. 7.5 mm diameter]]>