so i order some stuff from jab, and write a note saying if they have any clear elbow barb and cost less than $2, add 2. however they didn't have the clear kind so they send me 2 black one free of charge, and my order received 2 day later(very fast shipping). this is not the first time i had good experience with them. last time one of my fan filter was broken during shipping, they send me a replace one without charge within 2 days, and i don't have to send back the broken one for RMA either. So far i am very satisfy with their service, just like to share my exp with forum member