Bushes are required to be used in combination with Standard Couplings
when there is an outside diameter difference of more than 12 mm.
By combining multiple bushes made from different thicknesses
(5, 9, 14, 24 mm) almost any connection can be achieved ensuring a tight fit.
Bushes are manufactured with pretension and tighten against each other. This effect is supported through the toothing of the rubber profile.
Bushes with pretension for compensating larger outside diameter differences. Outside diameter differences need to be taken on site.