Black plastic head crimps easily using Seal Press (sold separately). Features an interior metal seam to eliminate tampering. The polytape strap has an embossed surface to minimize slippage while providing over 200 lbs. of tensile strength. Designed to fit either cloth or plastic coin bags. Closure: Crimp For Bag Type: Cloth Plastic Preprinted: Six-Digit Number Strap Length: 10.0 in.Unit of Measure : Box