Primal Gladiator's Mail Footguards is part of the transmog set Primal Gladiator's Ringmail Armor (Shaman only), which the Appearances collection lists in 2 versions. The other 16 pieces:
Items Numbered Next to Primal Gladiator's Mail Footguards
Blizzard numbers items as they are created, so the named items next to ID 115930 (115925 to 115935) were usually added in the same batch as Primal Gladiator's Mail Footguards: the same quest line, zone, vendor or reward set.