Spring balancer from 3 KG to 5 KG, model is HP3-5,min load is 3kg,max load is 5kg,stroke is 3 meters. Net weight is 1.6kg

 

Spring balancer from 5 KG to 9 KG, model is HP5-9,min load is 5kg,max load is 9kg,stroke is1.5 meters. Net weight is 4.9kg

 

Spring balancer from 9 KG to 15 KG, model is HP9-15 ,min load is 9kg,max load is 15kg,stroke is 1.5 meters. Net weight is 5.2kg

 

Spring tools balancer from 15 to 22kg  spring balancer from 22kg to 30 kg. Stroke is 1.5 meters, can added the stroke to 2.0 meters as you required.

 

Spring tools balancer from 22kg to 30kg, power master from 30kg to 40kg, zero gravity tools from 40kg to 50kg. Tools balancer from 60kg to 70kg. And 70kg to 80kg.  Stroke is 1.5 meters. And added stroke to 2.0 meters.