PLUMB-PRO® Professional Quality EPDM (Ethylene Propylene Diene Monomer [M-class]) Rubber Straps are made in the USA of the highest quality materials to offer a tie-down utility strap with exceptional strength. The EPDM rubber polymer used in the strap has a high crosslink density that allows them to be used in the harshest of environments without the risk of oxidation or weather stressed cracking. The strap is specifically engineered to absorb stress through a taper where the square head meets the body of the strap. The single piece molded construction ensures exceptional strength and stretch resiliency. The square head also provides a stronger point of contact with the S-Hook, the point where most strap failures occur. Made from UV-Resistant EPDM Rubber