This is a two scale clinometer; Top Scale gives accurate 1º readings - useful in balancing loads or platform leveling Bottom Scale gives 5º readings in a ±60º Material: PC, SOFT PLASTIC tube with Stainless Steel Ball Length: 4" Height: 3 1/4" Thickness: 1/2" Installation by four screws (not included) 1 year Limited Product Warranty see below for details. Item: P70086