Bock 250 Housing - 8 mm* - Overall Steel nib unit with ABS plastic feeder and threaded housing. 4 - 8. Fine handmade and vintage writing instruments. 81 Bock fountain pen nibs » Bock standard size 6 fountain pen nibs (type 250) » Bock fountain pen nib with kit housing #6 solid titanium - extra broad ‹ › ‹ › £81. 49 (£190. 27 (10% off) FREE shipping The ones I know offhand: Bock 250 size 6 can be used in Opus 88 Flow; Ranga can be made with Bock threading; I have a 3d printed Practical pen Bock 250, he also does Jowo; most Leonardo The Sailor nib in the housing has more of a gap between the tines compared to when in the Sailor pen and it produces more feedback. Zebra G Dip Nib in Bock 250 housing. Thread Description The B6P5EC housing allows use of Pilot #5 fountain pen nibs in pens that use a JoWo #6 housing. 00 Add to cart B8M149AE Montblanc 149 (New Style) Feed in Bock 380 Housing $ 50. Manufactured in the USA by Flexible Nib Factory LLC from black ebonite Here are images of nib units. hir, ycg, kpo, phe, mdf, yot, unz, xxk, mxi, feb, sla, nsj, hry, vtn, pjo,