by $18.90 This ”Follower Kit” is for use in STI (1st gen mag, 9×19), with spacer plate installed. This kit is designed for a mag OAL that measure up to 145mm long and includes a ”Grams Format” follower (S92) & (11) coil spring. SKU: FKS9-11 Categories: Follower Kits, STI/SV/SPS/CR Follower Kits Related products FKK38-11 $18.90 FKCMG-11 $18.90 FKXM-11 $18.90 FKC-13 $18.90