Unit has 11 rollers, 5 of which can be removed to accommodate various bottle diameters. Use O-Ring with hybridization bottles to equalize cap diameter with body OD when idler roller are removed. 3 bottles up to 120mm can be rotated at a maximum speed of 40rpm. Use o-ring with hybridization bottles to equalize cap diameter with body OD. When idler rollers are removed, 3 bottles up to 120mm can be rotated at a maximum of 6rpm.