Bussmann UK-6 American Glass Car Kit with AGC-5, 15 and 30, SFE-9, 14 and 20 Amp Fuses Carded - 6 Pack Fast-acting, glass tube SFE fuses are 1/4-Inch diameter and physical size varies with electrical rating of fuse to prevent over-fusing (size rejecting feature) AGC fuses are 1/4-Inch x 1-1/4-Inch (6.3mm x 32mm) physical size Glass tube, nickel-plated brass end cap construction UL Listed product meets standard 248-14