Digital Rail Inclinometer: Specefication - Length-60 Cm, Measurement Range 0-360 Degree (4 X 90 Degree) Electronics Measurement Accuracy 0 Degree/ 90 Degree Plus Minus 0.05 Degree, Electronics Measurement Accuracy At 1 Degree 89 Degree Plus Minus Degree, Measurement Accuracy, Vials Plus Minus 0.057 Degree = Plus Minus 1 Mm/M Weight Approx 0.77 Kg, Units Of Measurement- Degree, %, Mm/M Tripo D Thread ( One By Four Inch). [ Warranty Period: 30 Months After The Date Of Delivery ] ]