MDF Flush - Hollow Core with T-Guide cutout FOR All Cavity sliders & Track sliders Interior Door - Superior Doors Door Product: Supplied unfinished and without door furniture. Glass options are additional cost. RibCore provides a cost-effective method of increasing the strength of hollow core doors. These doors are manufactured to have up to 42% glue adhesion between the core and the door skin while cheaper traditional honey comb paper core used by most other manufacturers average around 4% glued contact. Features: Ribcore Polystyrene core Pre- Primed face suitable for painting Door furniture sold separately Specifications & Sizes (Sizes will vary from branch to branch) Standard Heights: 1980 (36mm thick) Standard Widths: 610 / 660 / 710 / 760 / 810 / 860 / 910mm Door Mass (For standard Sizes): Approx 15- 25kgs