No defects - the shape and surface of the suction head have no defects or defects to ensure pipetting accuracy;

Raw materials are pure and free of additives - to avoid the influence of dissolved substances on the experimental results;

Clean and free of biological contamination - The suction head should avoid the threat of biological contamination and be manufactured and packaged in an ultra-clean environment.

Compliance with quality standards - Suction heads from reputable manufacturers carry a certificate inside the package to prove which tests have been carried out to verify the product and how, guaranteeing that any potential contamination is below specific detection limits.