Surebonder #4 heavy duty 9/16" Leg Length staples. 1250 staples per box. Fits Surebonder models: 5600 5602 5685 5900 5900N 9600 Arrow T50 T55 CT50K Stanley TR 60 TR 85 TR100 TR150HL Powerfast (Swingline) 31690 31890 Bostitch VT-110. Use for window screens shades shelf lining plastic sheeting.