the bu-34c is a micro copper alligator clip with smooth jaws, typically used for testing delicate electrical components or circuits. compatible with mueller-brand bu-36 flexible pvc insulators. connects to wire up to 18 awg via solder or crimp connection. model #: bu-34c category: clips weight: 1.2 g dimensions: 1.1" (l), 0.2" (w), 0.31" (h) 34c bu34c product details material copper amps 5 jaw opening category .09 to .43 (in) wire connection crimp / solder wire gauge (awg) up to 18 rohs compliant yes clip length category 0.1 to 2.0 (in) clip form alligator alligator clip, 5-amp, copper, for size 20 wire or smaller, : 1-3/32 jaws open: 7/32", vinyl takes insulators red bu-36-2, black bu36-, mueller sc-34c-bu