1. Extension works good. 2. Extension is OK. 3. Extensions good luck. 4. Extensions never gets the powder to come out. It is a pain in the you know what. When you have multiple extensions on you get a fine dust out between the canister and extension but good luck getting anything out of the nozzle no matter how hard you pump. Would be better if it had a gasket between each extension
Terrible. Pump doesn't work well and deliver adequate air to the head for delivering dust. I have verified snug/tight connections and it's not bad seals in the connectors, especially because when using another pump it can work well. The only reason I gave this two stars is because it saves me from getting on a ladder when I rig up another air source.