Reedy's LiPo battery weights fit perfectly under your low-profile shorty LiPo battery so that you can add weight while reducing your vehicle's center of gravity for improved handling and stability on high-grip surfaces. Each set is precision cut from brass and contains one .5mm (22g) weight and one 1mm (36g) weight which can be used together or separately. Specifications: Weights (g/oz): 22 & 36g Dimensions (mm/in): 22g weight: 91.4x45.7x0.5mm (3.6x1.8x0.02") 36g weight: 91.4x45.7x1.0mm (3.6x1.8x0.04") Material: Brass