Caltech Engineering Services offer disposable plastic wft gauge is designed for once only use, simply place in the wet paint note the wet paint thickness, Allow paint to dry and retain for future ISO record or customer requirements. All gauges have Micron / Thou / Mil scales. It conforms to BS 3900-C5, ISO 2808-7B and ASTM D4414-A Standards. Caltech's wet film thickness gauge is designed to measure accurate liquid coating thickness in the easiest and fastest manner. It measures the thickness immediately after the coating has been applied on the material.WFT Gauge can also be used to measure powder coating thickness before it goes through curing. Wet film thickness is measured to determine the correct dry coating thickness.Wet film thickness gauges are also known as wet film gauges, notched gauges, step gauges and WFT combs.Disposable plastic wft gauge is designed for once only use, simply place in the wet paint note the wet paint thickness, Allow paint to dry and retain for future ISO record or customer requirements. All gauges have Micron / Thou / Mil scales as per BS 3900-C5, ISO 2808 and ASTM D4414 standards.