SENQCIA Hi-Max® spring clip type British Standard connecting links are manufactured in Taiwan in accordance with the ISO 606B International roller chain standard. Spring clips are supplied with slip fit closing plates for ease of assembly in the field. Connecting links are used to connect the ends of the roller chain strand into an endless loop. Each connecting link is individually packaged in a sealed plastic bag. SENQCIA Hi-Max® Connecting Link, British Standard Double Strand Spring Clip, 12B-2 Chain, 3/4 in Pitch, 0.225 in Pin Dia, 0.635 in Link Plate Height, 0.071 in Inner/0.067 in Outer Link Plate Thickness