The UR connector accepts two or three solid copper conductors for butt splicing|The connector is filled with a sealant to provide moisture resistance|Choose any one of the 3M Scotchlok Crimping tools E-9 to use with the UR connector|Not flame resistant|Accommodates 26 to 19 AWG conductor sizes|Durable polycarbonate construction|Comes in red color|Withstands a temperature range of -40 to 140 deg F (-40 to 60 deg C)|1,000 connectors (100 per box, 10 boxes per case)