Iso/pas 17712 certificated, c-tpat compliant Galvanized low carbon steel, wrapped with abs 8mm diameter steel perch Shape locking spring, keeping away from being pull out by high speed rotating action Removing with bolt cutters, eyes protection is necessary The height of male and female is 80mm and 34mm separately The bottom size of both male and female: 16mm x 20mm Standard packaging: 250pcs/carton Carton specifications: 22.8" x 13.38" x 7" (58cm x 34cm x 18cm) Carton weight: 15.4 kg / net: 14.4 kg