The popular 18G, Surebonder 55516, Heavy Duty 5/16" Leg Length, .417" Heavy Duty Narrow Crown Staples (Arrow T50 Type) are a must for the homeowner, not only for its many uses, but it will accommodate many staplers and staple guns. These staples are perfect for upholstery, fabric covering, window coverings, etc. For use in the following models: Surebonder 5690 Triggerfire, 5600 HD 3 in 1 Stapler, 5685 HD Professional/Contractor Gun, 5800 HD Hammer Tacker, and Surebonder 9600A Pneumatic Narrow Crown Stapler. Other models include Arrow T50, ET-50, ETC50, HT50A, HT50P, T55, Stanley PHT150, TR100, TRE500, TR100HL, TR200, TR60; Powerfast (Swingline) 10401, 31690, 31890; Ace Hardware 2014413; Craftsman 68434, 68514, 68517, 68492, 68515; Black & Decker 5700, 2000E, 3000E, 4000E, and 6000E. There are 1,250 staples in a box.