The Security Labels sticker number in each pack is sequential. But no duplication number, all numbers are Uniqueness, so there is no same number even in a different pack. This Security Labels sticker is small and unsuitable for sealing the cartoon/paper box, as it’s not as strong adhesive as packaging tape. You can cut a circle of 20mm with paper to check the size before ordering.
Tamper proof labels are explicitly applied to labels that provide evidence of tampering (tamper evident labels). These tamper seal stickers are available in wide varieties according to shape and design.