The SF-250 system is distinguished by: Vertical adjustment mechanisms. Rollers with ball bearings. Lower guide hidden or with lower profile. Galvanised steel profile.

The SF-500 system offers: Vertical adjustment mechanisms. Rollers with ball bearings. Lower guide hidden or with lower profile. Galvanised steel profile.

The SM-250 system offers: Vertical adjustment of the leaf. Rollers with two ball bearings. Wall or ceiling fixing. Lower guiding system with profile.

The SM-500 system offers: Vertical adjustment of the leaf. Rollers with four ball bearings. Wall or ceiling fixing. Lower guiding system with profile.