Dimensions: 1/2 hole — 3/8 head 3/8 hole — 1/2 head 3/8 hole — 1/4 head 1/4 hole — 3/8 head 1/2 hole to 1/4 head 1/4 hole to 1/2 headColor: SilverMaterial: 45# steel Post navigation YS6010 Benchtop Grating Spectrophotometer TFT Capacitive Touch Screen Display To Do Precise Color Analysis And Transmission In L 80pcs PH Meters PH Test Strips Indicator Test Strips 1-14 Paper Litmus Tester Urine Saliva Convenient Useful Testing Tool