Rapesco Staples 923 Series 10mm Pk4000 for Heavy Duty stapling machines using 923 type staples. Also compatible for use in Swingline Heavy Duty, Rapid Type 9, Rexel Type 23 and Type 66 and Novus Type 23 Staplers. These will also fit 5 Star and Q-Connect heavy duty staplers. Box of 4000 Staples containing four inner boxes of 1,000 staples each in leg length of 10mm.