You are buying a quantity of 2) TWO mounting blocks for this one price.

WHITE SURFACEMASTER SURFACE BLOCK For Dutch Lap siding
EZ Block
Vinyl Mounting Blocks
Siding Accessories
6-3/4” x 6-3/4”
EZBLK070 

Carriage Light Mounting Block

Security Light Mounting Block

Surf Block

The 1-piece design can be used after siding installation to mount all types of accessories. Compatible with Dutch Lap siding profile. Manufactured with ultraviolet-stabilized color, minimizing the effects of exposure to the elements.

Rich textured appearance.
Surface dimensions: 6-3/4" x 6-3/4".
Projection: 3/4".
Knockouts: Round 1" diameter; rectangle 2-3/8" x 3-3/4".
Limited lifetime warranty. Surface Dimensions: 6-3/4" x 6-3/4"
Material: Vinyl
Rectangular Knockout: 2-3/8" x 3-3/4"