You are purchasing ONE Piece of the Hayward SPX550-Z-4 ,SPX0550Z4
100W 12V Pool/Spa Clear Incandescent Light Bulb Lamp
Pool Spa Clear Lamp Light Bulb 100w R20 12v
Replaces Hayward SPX550Z4,SPX550Z-4,SPX550-Z4,
R20 short mini flood 100W (watt) 12V (volt) incandescent bulb/lamp with brass E26 medium screw base.
Replacement for swimming pool and spa lighting. Thicker filament and glass helps withstand heat. Multi-filament supports resist vibration, internal heat shield prevents separation, heat resistant cement assures no loose bases, brass base resists corrosion.
3-5/8" long, 2-1/2" across