CZ P-07/P-09/P-10 Spring and Follower Kit by Grams Engineering
FKCP-11 (Follower Kit - for CZ P-07, P-09. & P-10 Mags, that measure up to 145mm long, (includes Grams Format Follower & 11 coil spring)
Using these in my A01 for USPSA. They are reliable and allow 23+1 in my 141.25mm 19 round magazines with +3 Henning baseplates (BSPS also sells these). Would recommend!