While using popular aquarium test tubes we noted with disappointment, that when shaking to mix test solutions with the water sample, drops of the corrosive mixture ended up on our fingers and the floor. This led us to source leak-proof caps, so that keeping our aquarium water in check does not mean exposing our skin to highly toxic chemical solutions nor having it splash the bench-top and floor. Note: As the neck of the test tubes - given the screw-on caps - are narrower than the alternative, it may be helpful to use a nozzled 5ml syringe for dispensing aquarium water into the test tubes.

Please note: rack is not included in this offer. Made of borosilicate glass of 1mm wall thickness, 13 mm diameter. 5ml mark for aquarium water and sufficient additional capacity to hold API test solutions. Customised for use as REPLACEMENT TEST TUBES for all aquarium water tests. Set of 6 flat-bottomed glass test tubes with leak-proof screw caps - NO MORE SPILLS!.

GTIN: 037203775480. UPC: 037203775480. UNSPSC Code: 41000000. Size: 13mm. Part Number: NA. Number of Items: 6. Material: Borosilicate Glass. Ean: 0037203775480. Brand Name: Tililly Concepts. Best Sellers Rank: See Top 100 in Pet Supplies. : B07Y6BR3GC. Manufacturer: RSE. Date First Available: September 21, 2019. Package Dimensions: 4.6 x 2.6 x 2 inches; 2.4 Ounces.