One of the our customer is currently buying aluminium slugs from China. Aluminium purity is above 99.7%. Please let me know if you make aluminium slugs for the manufacturing purpose of aluminium collapsible tubes. Our monthly volume is a little over 60 tons Below are the sizes: 1. Without center hole Diameter x thickness 13.3 x 4.5 15.8 x 4.75 18.8 x 4.3 21.8 x 4.3 24.8 x 4.75 31.8 x 4.5 2. With center hole Diameter x center hole diameter x thickness 13.3 x 5 x 5.5 15.8 x 4.5 x 5.25 18.8 x 5 x 5 24.8 x 9 x 5.5 for the time being I think the above sizes are enough. the slugs must be contain at least 99.7% purity of aluminium, well annealed, vibrated, flat shaped. hardness not over 21HB. We prefer to communicate with manufacturers only. Show More