A nice touch with these copper discs round is the soft cloth bag they arrive in for storage.
Lot of 5 Sylvania FS-4 Fluorescent Lamp Starters 40 Watt Aluminum FS4 Robot Cop
What stands out about this product is the integral spikes that add real traction.
21pcs FS-4 Fluorescent Lamp Starters 30/40 Watts Aluminum FS4
You will find that Carrier items are easy to find at most suppliers.
