gm 21Harga Gundam Marker - GM 21 GM21 Sumi-ire Brush Pen (Gray). Rp34.000. Harga Gundam Marker Brush Pen GRAY for Panel Lining GM21 GM 21The GM 21 is a budget-friendly Android smartphone with a 6.52-inch IPS LCD display, an octa-core processor, and a 5000 mAh battery. It runs on Android 11, supports 4G