Product Description: HIGH QUALITY TOOLS: This is a great tool for measuring the thickness of paint, varnish, etc. ADVANTAGE: These combs six sides vary in size giving 24 or 36 measurements, depending on the comb, providing increased accuracy GREAT QUALITY: this wet film comb is made of stainless steel, which has excellent strength rust-proof, sturdy, durable and can use for a long time DETAIL DIVISION: the interval division is detailed and has high measuring accuracy SIZE: Side length: Approx 40mm / Approx 1.57inch This precision formed stainless steel wet film comb is durable and reusable and comes in a range of thicknesses measuring up to 3000um. This wet film comb is made of stainless steel, providing excellent rust resistance. Convenient and practical, easy to use. Interval division is detailed and has high measurement accuracy. It is an excellent tool for measuring the coating thickness of paint, varnish, etc.