Material: Acrylic + Magnetic base + plastic case.,This RV levelers with Magnetism on the base, can absorbed onto the iron- or steel-surface for leveling.,Come with 8 Pieces Screws for for easy mounting to leveled surfaces.,Dimensions(Width x Length x Height ): 1.72 inch x 2.26 inch x 0.51 inch. Package: 4 x T Levelers.,Multi-purpose, cross check, 2-directional levelers can adjust both vertical and horizontal surfaces.,The small size T levelers can be permanently mounted to various places in rv so that you can always verify if it is still level.