Cable Tie 18lb 4" Aqua Radiation Resistant Fluoropolymer (Tefzel) with Stainless Steel Locking Device Bulk Pack 1000 Pieces Per Bag Oval low profile head is designed to prevent snags on uneven surfaces and easier to pull through bulkheads. Non-magnetic stainless steel locking device insures both maximum strength and the right tightness every time. Because there are no notches, Ty-Rap ties provide an infinite number of locking positions while fastening the tie at the precise bundle diameter needed. Tefzel cable ties offer high-radiation resistance and temperature stability to 302 degrees fahrenheit. Also, Tefzel provides excellent resistance to UV light and meets UL flammability rating 94V-0. FACTORY NEW - OEM TRACE - MFR C-C AVAILABLE 4" Aqua Radiation Resistant Fluoropolymer (Tefzel)CABLE TIE Thomas & Betts TY-RAP TYZ23M