[Size] Total length 144.5mm x shaft diameter 9-10.2mm x maximum diameter 11.8mm [Weight] 21g [Ball diameter] 0.7mm [Core diameter] 0.5mm [Material] Shaft, base, knock, crown: Brass, clip: SK material, POM [Country of origin] Japan [Refill] R-4C7NP black/red (0.7mm)
