Product Info Catalog Electrical & Lighting Lamp & Fixture Parts Lamp Parts Metal Shell Lampholder, Turn Knob, 3-Way, 250-Volt, 250-Watt Metal Shell Lampholder, Turn Knob, 3-Way, 250-Volt, 250-Watt Request a Quote UPC: 785007864465 Manufacturer: Pass & Seymour SKU: 574253 Model Number: 7090MBPCC5 250w, 250v, 3 way incandescent turn knob metal shell lamp holder interior socket, medium base, electrolier, low, medium & high.