... I clip, Type II clip, Type III clip, Type IV clip, Type V clip, Type VI clip, PR clip, Anchor clip, nikka rail clip, spring clip 2. Elastic clip (E clip), diameter ... can be 16, 18, 20mm. such as 1609, 1809, 1817, 2007, 2009, 2055, 2056, 2011 and so on ...