This listing is for a high grade stainless steel strap hinge. Heavy duty construction. 4mm thick main parts with oversize 8mm diameter hinge pin. Made from 316 (ANSI Graded) marine grade stainless steel, with a mirror polish. Ideal for use were corrosion is a concern. 4 x M6 mounting holes. Up to 270 degree opening depending on application. (180 degree in standard flat mounting) 145mm total length, 59mm width. Precision machined for a smooth operation. Made in Italy.