Following recent changes to shipping regulations post-Brexit, we can no longer lawfully ship Chemicals overseas to addresses in Northern Ireland - please do not attempt to checkout with chemicals in your basket if you are a resident of Northern Ireland. Perfect for the residential user, Wave test strips are manufactured in the UK and subject to the same rigorous quality control as other pool testing products. Supplied in pots of 25 tests, the procedure is exactly as expected - dip, shake off the excess and compare to the colour chart printed onto the pot. Test strips available: 3-way test strip providing testing on chlorine, pH, Alkalinity. Perfect for the residential user, Wave test strips are manufactured in the UK and subject to the same rigorous quality control as other pool testing products Supplied in pots of 25 tests, the procedure is exactly as expected - dip, shake off the excess and compare to the colour chart printed onto the pot.