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HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range, 1 ppm Resolution, 3% Readout AccuracyProduct Description: A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water. With the push of a button, the TDS-EZ can tell you y...$15.25$17.77
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Practical Electronics for Inventors, Fourth EditionPublisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product.A Fully-Updated, No-Nonsense Guide to ElectronicsAdvance your electronics knowledge and gain the skills necessar...$22.01$40.00
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The Survival Medicine Handbook: A Guide for When Help is Not on the WayThe 2nd edition Survival Medicine Handbook(tm) is a guide for those who want to be medically prepared for any disaster where help is NOT on the way. This book is written by Joe Alton, M.D. and Amy Alton, A.R.N.P., the premiere Medical Preparedness Professionals from the top ten survival website doom...$34.95$39.99
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CRKT Bottle Opener Paracord Accessory: Multi-Tool for Everyday Carry, Emergency Paracord, Bottle Opener, Carabiner 9450KHelps in every emergency. A stubborn beer cap, for instance.You never know when trouble will hit. Best to be prepared with the Tom Stokes-designed paracord accessory. It features a bottle opener and three-foot length of paracord in black or tan on a non-load-bearing carabiner to clip to your pack. I...$10.11
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CRKT Paracord Bottle Opener with Carabineer, Tan 9450THelps in every emergency. A stubborn beer cap, for instance. You never know when trouble will hit. Best to be prepared with the Tom Stokes-designed paracord accessory. It features a bottle opener and three-foot length of paracord in black or tan on a non-load-bearing carabiner to clip to your pack....$12.65$12.65