This is the original gaslift that comes with the following models:
Verona Pro V2 (not listed on the website)
Disclaimer: This type of gaslift is only compatible with chairs that have the larger wheels. Because of the shape of the gaslift it will go through the wheelbase quite far so the wheelbase must be raised up with the larger wheels.
Height: 24 – 30.5cm
Class: Class 4