Fits click pens from 1940s, 1950s, 1960s, 1970s, 1980s High-quality refill cartridge and ink black ink, X10 style, Brass, includes spring retractable, collectible, promotional pen refills This low-cost item not eligible for Prime These are the exact refills that would fit your ballpoint click pen from the 1940s, 1950s, 1960s, 1970s and 1980s (X10 style.) After that, the industry standard started making THICKER ballpoint pens with a different style tip. Normal outlets only sell the refills now for THOSE and it is very hard to find the refills for the old-fashioned, vintage ballpoint pens. Sound Feelings pen refills are made in the USA and are manufactured with superior workmanship. The cartridge is made of brass metal with high-quality ink that flows smoothly. Medium tip is standard. Brand: Sound Feelings. Material: Metal Length: 106.8mm (about 4 1/4 inches) Tip Diameter: 1.63mm Point type: Medium (1mm). Please look on Amazon for ALL colors available, Black, Blue, Red, Green -- by searching "Vintage Ballpoint Pen Refills" from "Sound Feelings." You have found the source for... Rite-O-Graph refills Skilcraft Government Pens refills Dr. Pepper 10 2 4 pen refills advertising ballpoints refills giveaway ballpoints refills Vintage Paper Mate Double Heart pens, Vintage Planters’ Mr. Peanut, All Rite pens, Curtis Rand pens, Gold Bond pens, Sheaffer Advertising pens, Ready Riter, RitePoint, 1978 Hulk and Spider-Man pens, heirloom, vintage sterling silver pens from Israel refills (often sold as a “religious article,” made by Globus.) presidential library pens, vintage Apple Computer Logo Pen from the 1980s, Chromatic USA souvenir Vintage Celebrity Cruise Pens and Chromatic USA Single-refill twist-action advertising pens, US Pencil Company pens, USCO, UNIPECO, Starlite, Auto Magic, All-Rite, Wilkinson-Akers, Tuckersharpe, Wings, Ambassador, Alexander, Hallmark CLICK pens, Kwik-Klik pens, Everglide pens, Arpege Chanel No. 5 14 K Gold Filigree pens, Satellite pens (Hungary), Penco Biro-Graph, Wearever, Amsterdam, McColl, Graph-O-Matic, Telstar.