SD1 - Sparrow Door (Spare-O-Door) (Made In USA)
[SD1]

I have had MSS12W martin houses for over 30 years. I have used this sparrow door trap for many years with success. This trap is the only one that will trap the sparrows in the houses. I've tried other brands of sparrow traps for martin houses with no luck. This is the only one I will use. Great product!