The Cal Royal Products 400 Series Door Closer is for lighter use interior doors. This closer is considered a Grade 2, which means it is only rated for 1,000,000 cycles. The 400 Series is a sized closer, meaning you can not adjust the spring tension, the spring size you select is what you get. Also, make sure to note the hole spacing of the various sizes below. These closers also offer adjustable closing and latching speeds.
Size 420 3/4" x 5-3/16" hole spacing
Size SM 430P 3/4" x 6-1/2" hole spacing
Size 430P 3/4" x 8-3/16" hole spacing
Size 440P 3/4" x 9-1/16" hole spacing