Polyethylene Plasti Seals are easy to crimp. The 10 inch long, 5mm wide polytape has more than 200 lbs. of tensile strength, and its embossed surface makes it easy to tighten without slipping. Strong double-steel prongs grip both cloth and plastic bags securely. Use Block"s Standard or Ratchet-Style Seal Press. Plasti Seals are available plain or with random numbers. Shpg. wt. 3 lbs. Packed 250 per box. Quantity discounts apply to orders of the same Cat. No. shipping to one location. Call 1-800-323-7556 for quotation on custom imprinted Plasti Seals with consecutive numbers or a combination of letters and numbers.