Catalog Items > Nitrogen Gas Springs > Series > 90.5B2 Series 90.5B2 Series Shorter than ISO Standard Nitrogen Gas Springs with forces 1.5 to 3 tons. 90.5B2.01500 Ø75 with force on-contact to 1527 daN / 3432 lb. 90.5B2.03000 Ø95 with force on-contact to 2945 daN / 6619 lb.