"The cassette of 1000 OPTO Markers TC27 rings in white represents a practical and effective solution for meticulous marking in various contexts, such as laboratories and medical environments. Each ring provides clear and durable identification of test tubes, contributing to optimal organization of samples. The white color ensures sharp visibility, while the generous cassette of 1000 units allows for long-term use without compromising the quality of the marking. With these OPTO Markers TC27 rings, sample management becomes smoother, offering a reliable solution to meet the demands of precise and systematic marking."