Primal Gladiator's Linked Sabatons 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 Linked Sabatons
Blizzard numbers items as they are created, so the named items next to ID 115869 (115864 to 115874) were usually added in the same batch as Primal Gladiator's Linked Sabatons: the same quest line, zone, vendor or reward set.