BuyCableTies Extra Heavy Duty Cable Ties - 250 lb Rated (22 inch - 25 pk, Black) Heavy Duty 250 Pound tensile strength cable ties for wire, construction, and industrial use Black is rated for Indoor / Outdoor use - Natural is for Indoor use - Nylon 6/6 UV Stablized - Temperature rated -40F to 185F The perfect wire and zip ties for any heavy duty job. Lengths from 21 to 28 inches Contains 25-50 per pack (L 22 x W .5 x D .1 in.) From BuyCableTies: US based manufacturer of cable ties, zip ties, and cable strapes