VIVOSUN PH Meter Digital PH Tester Pen 0.01 High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium, with ATC, Army Green auspowers_batchone Alloy ball bearings: The tabletop

Alloy ball bearings: The tabletop equipment roller slides smoothly over the playing surface of the game to mimic the real curling and shuffleboard for maximum fun

Suitable for water sources in lakes and streams

It is a good choice as an outdoor or indoor emergency antenna

This item can be purchased with 6 x 3/4" screws

Thread Size 10-32

VIVOSUN PH Meter Digital PH Tester Pen 0.01 High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium, with ATC, Army Green auspowers_batchone Alloy ball bearings: The tabletopVIVOSUN PH Meter Digital PH Tester Pen 0. 01 High Accuracy Water Quality Tester with 0 14 PH Measurement Range for Household Drinking, Pool and Aquarium, with ATC, Army Green Product Features High Accuarcy: Tester has a sensitive electrode sensor to read accurate PH levels; the included detailed manual will show you how to get the best accurate and stable reading Easy to Calibrate: Press CAL for 5 seconds to enter the calibration mode, press in turn