Quad 3 1/8" squareLeft; OP 100 psiTop; AMP 60-0-60Right; OT 100-260fBottom; FP  0-15 psiUse with387-100KV OP sender sold separately387-15KV FP sender sold separately399 series OT sender sold separtely237-60 ammeter shunt sold separatelyLight kit 186-12A2L sold separately