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.
Orbit Molecular Models Class Kit, Contains twelve model kits and instructions for guided learning, Students make models of 6 base pairs each that can be joined together to make a molecule of up to 72 base pairs, Compatible with Hubbard Molecular Model Kit R-MOD1
Simple Anemometer, This simple tool measures wind speed and direction, The wind speed range is 0 to 17 meters per second (+/-10%). The direction indicator is divided into 16 compass points, A built-in compass is provided, Dimensions: 9in x 6in x 6in
2KG For use in any automatic labware washing machine. Contains phosphates. Chlorinated for biohazard control. Non-corrosive to machine components - pumps, seals, liners.