Ring Lock Part 1.Tube: 48.3mm 2.Thickness: 3.25mm 3.Finish: hot dip galv. 4.Size: 500, 1000, 1500, 2000, 2500, 3000, 4000. Ring Lock Part1. Tube: 48.3mm 2. Thickness: 3.25mm 3. Material: Q345 4. Finish: Hot Dip Galvanizing 5. Size: 500, 1000, 1500, 2000, 2500, 3000, 4000We still have accessories for ring lock scaffolding system and also cup lock scaffolding.