18ga. Galvanised. Suitable for light duty and trade brad nailers: Pro 18GEL, 13EL, ACE and K 18 / 50 and 18 / 32 and Rapesco SP18GEL, 53EL, and Z140 and SB-1850BN. Specifications: 18ga.Equivalents: Atro TIP. BEA SK400 / 1200. Duofast HB60. Suits: Light Duty and Trade Brad Nailers, Pro 18GEL, 13EL. ACE and K 18 / 50 and 18 / 32. Rapesco SP18GEL, 53EL, and Z140 and SB-1850BN.