SX Staples are the equivalent of 90 Series Staples
Bostitch code: SX503512Z
Fit Stanley Bostitch: S32SX-1, SB-150SX, SB-150SXHD-1, SB-2IN1, SB156SX-1-E, SX150-1, SX150-BHF-2, SX150K-1, SX150LM-1, SX1838-E, APC-2IN1 plus many other 90 series or 18 gauge staplers
