Available in four sizes: short, medium, long and mini.
You have a choice of metallic, matte metallic, or black.
Recommended sizes for people is based on their height:
| User Height | Recommended Spring Size |
| Under 5′ | Short |
| Under 5’6″ | Medium |
| over 5’5″ | Long |
The mini gas spring is for special circumstances only, its use is not dependent on the user’s height but on the working height.
Chair height ranges vary somewhat between chair models.
| Model→ Cylinder↓ |
Swing | SwingFit | Small SwingFit |
Multiadjuster | Small Multiadjuster |
Twin |
| Short | 16.7″- 21.3″ | 16.9″- 21.4″ | 16.9″- 21.4″ | 17.5″ – 22″ | 17.5″ – 22″ | 17.3″ – 21.8″ |
| Medium | 20.3″ – 27.4″ | 20.3″ – 27.4″ | 20.3″ – 27.4″ | 20.8″ – 27.8″ | 20.8″ – 27.8″ | 20.8″ – 27.8″ |
| Long | 23″ – 32.5″ | 23″ – 32.5″ | 23″ – 32.5″ | 23.6″ – 33.1″ | 23.6″ – 33.1″ | 23.6″ – 33.1″ |
Note! The chair height range is different when you use the Foot Control:
| Model→ Cylinder↓ |
Swing | SwingFit | Multiadjuster | Twin |
| Short | 19.3″- 24.4″ | 19.7″- 24.8″ | 18.5″ – 23.6″ | 18.9″ – 24″ |
| Medium | 23″ – 30.5″ | 23.8″ – 31.1″ | 22.6″ – 29.9″ | 22.6″ – 30.1″ |
| Long | 26.2″ – 36.2″ | 26.8″ – 36.8″ | 25.6″ – 35.4″ | 25.6″ – 35.4″ |