TE Connectivity SOLISTRAND Closed Barrel Strap Butt Splices SOLISTRAND closed barrel strap butt splices designed to terminate solid and stranded wire and irregular shaped conductors. These SOLISTRAND closed barrel strap butt splices are made from fine grade high conductivity copper and have closed barrels with brazed seams that create a uniform metal strength around the barrel. The inner surface of the barrels are either dimpled or serrated for maximum tensile strength and to maximise the electrical contact area after crimping