Borosilicate Test Tube Set — 25-Piece with Wooden Rack, 16×150mm

The test tube is the atom of chemistry equipment — small, transparent, and endlessly versatile for reactions, storage, heating, and observation.

These 16×150mm borosilicate tubes are the standard laboratory size, compatible with most test tube holders, racks, and centrifuge adapters. The rounded base allows even heating over a flame, and the fire-polished rim is smooth enough to accept a stopper without cracking. Supplied with a varnished wooden 25-hole rack that keeps tubes vertical and organized.

• 25 borosilicate test tubes, 16×150mm — rounded base, fire-polished rim
• Wall thickness 1.5mm — rated for Bunsen burner direct flame
• Wooden 25-hole rack included; tubes compatible with #2–4 stoppers
• Borosilicate 3.3 glass — autoclavable, acid/base resistant

Every purchase directly funds independent physics research at the Golden Physics Project.