The use of any specific model (part number) is dependent on the weight of the lid. Please refer to the bottom section of product catalog page for the torque value.
UDH torque dampers are typically installed with a bracket so that the torque damper can create the soft-close function. Recommended brackets we carry are our HG-JH25 or HG-JH35. Please feel free to send us an email (email@example.com) if you have any questions about UDH.