any custom sizes clamp
m52x0.75 to dieamter 70.6 ( Cinelux,Isco sizes) also m49.m55.m58.m62.m67.m72.m77.m82.m86
clamps to attachments like sankor 16c, kowa 16 d...etc.. around 43 mm diamter rear parts scope.
______________________________
ask me in your case