Our Mouldings › MA3318 Casing Image 1 of 2 Image 2 of 2 MA3318 Casing $0.00 The item pictured is 13/16" thick x 3-1/4" wide, but can be produced in various sizes from 3" to 3-3/4". Flex is available in F318-3. Click here for a to scale PDF of this profile. Quantity: Add To Cart Added! The item pictured is 13/16" thick x 3-1/4" wide, but can be produced in various sizes from 3" to 3-3/4". Flex is available in F318-3. Click here for a to scale PDF of this profile.