... /serial no. 4.Strength>22KN High security seal SY-801 (bolt seal, container seal, metal seal, high security sea, cargo seall) 1. Main ... strength against tampering and high security!) 4. Customization: Laser print serial numbers up to 8digits on bolt and on cylinder, color , barcode ... :2000 8. Bush affixed to pin for easy handling, similar bolt seals like SY-803B & SY-805B