US$ 49.95
has dual conductivity so current will flow through both sides and the adhesive
If that doesn't do the trick
Reliably manage your pH levels with the General Hydroponics pH Test Indicator
Even blurring
SP Series: SP10 SP20 SP50 SP50+
Eisco Labs Hooke's Law Spring auspowers_batchone has dual conductivity so currentEisco Labs Hooke's Law Spring The Hooke's Law spring set is used as a piece of the Visual Scientifics Hooke's Law kit (SKU PTHOKL). Product Features 3 spring set for use with Visual Scientifics Hooke's Law Apparatus Spring Cylinder Length (Between Loops): 1. 25in Spring Cylinder Diameter: 0. 38in
US$ 49.95
US$ 52.99
US$ 175.00