Hammond Power Solutions FG3 Finger Guard Kit Brand: Hammond Power Solutions. Part Number: FG3. HPS Imperator Finger Guard Kit, Fused, 1.75 in H x 3.15 in W x 2.55 in D, For Use With: MBMH 100 VA, AJ, AR, MQMJ, MEMX, QR, SP, PG, PP 250 VA and All 150 VA Encapsulated and Commercial Potted Industrial Control Transformer, Plastic, Clear. Additional Description: HPS -FG3 (O) FINGER GUARD KIT. Catalog Description: Control Transformer Accessories - Optional Fused Finger Guard Kits, 100 VA For MBMH, 150 VA For All Suffixes, 250 VA For AJ, AR, MQMJ, MEMX, QR, SP, PG, PP Suffixes..