Based on this product's specifications, here are some alternatives and similar models
End Caps Lightwin for Micro Tubes 7–20 mm, model DC 14MM — protective end cap
Summary description:
Lightwin end caps, model DC 14MM, are protective caps designed for micro tubes with diameters from 7 to 20 mm. They provide sealing and mechanical protection at tube ends, help prevent dust and moisture ingress, and reduce damage during handling or transport. Suitable for industrial, laboratory or installation use where secure tube termination is required.