This product is the function of ventilation. Material is easy to iron, the maximum diameter is 9.5MM, long10MM,6.2MM6.2MM path, The material of products according to the request of the guests to the production. The products my company has two kinds of material: easy to iron and brass.Materialaccording to customer needsleghth10MMDiameter9.5MMColoraccording to customer needs air ventilation valve