3.6", 18 lb. UV black TY23MX T&B Ty-Raps. Bundle diameter of 0.625". Made in the USA. The T&B Ty-Rap brand you know and love offers a stainless steel lock embedded in the 6/6 Nylon head for extra durability. The sun won't fatigue these cable ties. The UV protection allows these cable ties to last longer outside. Operating temperature -40 degrees F to 185 degrees F. UL Flame rating 94V-2.