Safety-engineered needles with attached pivoting shield to protect user. Patented safety shield allows for one-handed activation to cover the needle immediately upon withdrawal from vein. 21 gauge. Green hub. Length: 3.175cm.
Basic circuit kit, with a switch, (2) 'C' Batteries with Holders, (2) Light Holders, (5) Bulbs, and bulk wire for connecting, for a classroom or home experiment. One kit works well for a group of 3-5 students and demonstrates the pricinples of circuits and electricity
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