STEADY MOUNTINGKeeps in place, even in rough conditions EASY TO READSafe and swift reading so you can set the right course The SILVA Clinometer is a popular clinometer for all types of vehicles. It has two scales, one ±35° and a fine tuning scale ± 5°. The SILVA clinometer is used for checking the heeling angle on sailing boats and for the power-trim check on powerboats. It is also a perfect working instrument for other applications, such as making sure that different vehicles and equipment sits “level” or keep the desired a angle. For angles up to ± 5°, read the top precise scale, for angles over ± 5°, use the lower scale for readings up to ±35°. Specifications: Article number 35188-901 Graduation ± 5° / ±35° Material Acrylic Resolution degrees / mils 1° / 5° Scales ± 35° and ± 5° Size 10x80x100mm Temperature operating range -20 to +60 °C Water resistance IPX8 – Waterproof Weight 47g