30ST - hocker with footrest, plastic backrest, Self mechanism, 5-star base
31ST - hocker with footrest, plastic backrest with upholstered pad, Self mechanism, 5-star base
Synchronous mechanism SELF (self-weigh) with the possibility of locking in two positions (basic and maximum reclined). ST version - with height adjustment function.
5-star base, polyamide (version ST).
In models 30ST / 31ST:
- base colour black - plastic elements black or grey (RAL 7043), castors black, gas lift black,
- base colour lightgrey - plastic elements lightgrey (RAL 7047), castors black, gas lift black.
Gas lift with additional cushion for a better sitting comfort (version ST).
Castors hard or soft, with a brake.
Option: teflon glides, black.
Castors are equipped with reverse brake, which enable chair from moving away while seated.
Plastic backrest made of polyamide (PA with fiberglass).
Available in version entirely plastic or with upholstered cover. Backrest pad - cut foam with a density of 35 kg/m3.
30ST - 14,5 kg
31ST - 14,0 kg
30ST - 17,0 kg
31ST - 16,5 kg