5 mm in top and bottom as follows R&A standards

Translated with DeepL

Here you can find our suggested installation method: "How to install your net"

For 91 balls - easy and fast to use

laqua twin ec meter sp2205lp Træningsbur 5 mm in top andPut the power of a laboratory right in your hands. Professional grade meters Measure samples in nutrient solutions, water, soils, and tissue sap Waterproof pocket sized meter with digital calibration Sensors store dry and are field replaceable Accuracy correlates well with laboratory analysis Unique flat sensor allows you to conveniently and accurately measure samples as small as 0. 3 ml Automatic temperature compensation, waterproof, auto power off