API Test Tubes with Caps Aquarium Test Tubes 24-Count Box

Authentic API replacement test tubes with caps are designed for use with any aquarium water test kit. Compatible with freshwater and saltwater test kits, including pH, ammonia, nitrate, reef, and calcium tests. The plastic tubes have snap-tight caps. The product dimensions are 18.1 x 3.18 x 8.89 cm and the weight is 90 g.