... 13mm, 16mm, 19mm, 20mm, 22mm, 25mm, 28mm, 33mm, 35mm and other size as customers?requirement. ... 3. Finial with different materials Available materials for finial: Aluminium-alloy, zinc-alloy, wrought iron ... painted, such as black, white, black brush gold, black brush silver, etc; Any color of PVC pater ... . We offer products speically for Arabic people and kids, too. cap for 28mm aluminum pipe