Making your own sub-woofer/speaker? then you will need professional looking speaker connections to finish the job off.
High quality with solder connections on back of each binding post.
Solid metal screw down binding posts
Gold Plated Contacts
Dimensions are as follows:
Inner circle diameter - 68mm/2.7"
Outer circle diameter - 99mm/3.9"
Depth - 25mm/1"
Use a 2 3/4" diameter drill to cut the correct size hole