The Hatroi HA149 clamp is specified with a 30mm nominal diameter and is intended for use with the #150 35CC engine family as referenced in the product title. It serves as a simple retention device to keep silicone fuel lines firmly seated on the fittings commonly used in RC model engines.
Fitment is simple: place the clamp over the line, route the hose onto the barb, then compress the clamp evenly to secure the joint. By keeping the tubing locked in place the clamp reduces the chance of fuel weep and helps preserve predictable engine response during bench checks and running.
The silicone compound provides elastic recovery for multiple service cycles while matching the soft-wall tubing often paired with small glow engines. For use with other engines verify outer diameter and fitting geometry before assuming compatibility.
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