I have a job that requires Black end caps for 150 x 50 x 3 RHS. QTY of around 600-1000.
We do stock the 150x50mm tube insert which takes a wall of 2-4mm. The price is, $2055.94 for 500pcs or $2741.25 for 1000pcs. These are currently available ex stock. Prices quoted are Ex GST and freight charges.