◆ ball diameter: 0. 7 mm ◆ compatible products from other companies: Dragonfly: BR-NF NFL, pilot :BPRF-6 F, Mitsubishi pencil: SA-7 Axis: PP pen tip: stainless steel Adaptive products: ?ballpoint BK70 & BK407? t? s. E ball 0. 7 [fine]. How to order in shopping cart