Lochinvar® Pilot Ignitor, For Use With: 701, 801, 601, SB 1000, SB 1300, SB 1500, AW 1000, AW 1300, AW 1500, AW 601, AW 701, AW 801, XP 1015, XP 1320, XP 1520, XP 601, XP 701, XP 801, KB 600, KB 700, KB 800, AW 600, AW 700, AW 800, Lochinvar Parts, Pool Heater Parts, XLP, 5.15 in L x 1.4 in W x 0.65 in H