Ribcore Grooved Atoll - Classic 36 Interior Door - Superior Doors Door Product: Supplied unfinished and without door furniture. U Groove Component Specifications CLASSIC 36 - 1980 SKIN - 3mm Pre-Primed MDF CORE - RibCore Standard Density RibCore Polystyrene Core LOCKBLOCK - Particle Board 300x75x30mm from center of door 1980mm / Particle Board 600x75x30mm from center of door 2200mm FRAME - Finger Jointed Pine 30mm thick x 25mm depth (maximum trim down 5mm from edges) THICKNESS - 36mm Specifications & Sizes Standard Heights: 1980 (36mm thick) / 2200mm (36mm thick) Standard Widths: 410 / 460 / 510 / 560 / 610 / 660 / 710 / 760 / 810 / 860 / 910mm Door weight(Approx) : 1980mm: 6.5- 11.7kgs / 2200mm: 7.2 - 13.2kg Groove shape: U groove only (V groove please see Premium 38 option)