• ARO Plank 4
  • ARO Plank 4

ARO Plank 4

ARO Plank is a wall system composed of modular planks that assemble to create standard patterns, yielding a continuous architectural finish. ARO Plank 4 has three distinct modules: Wide (A), Narrow (B), and Rib (C). Flat planks are accented by ribs, creating a striped, corrugated effect. Flat modules are composed of leather-wrapped PET substrate and are available in four standard configurations. Planks install quickly and easily with Spinneybeck’s Interlock Mounting System and are available in a wide range of leather qualities and colors.

  • Designer Architecture Research Office
  • Content European cowhide, PET substrate + Plywood
  • Plank Thickness 2 5/8 in (6.7 cm)
  • Standard Configurations Plank 4.1, Plank 4.2, Plank 4.3, Plank 4.4
  • Plank Widths A (Wide): 1’-6” (45.7 cm)
  • B (Narrow): 9” (22.9 cm)
  • C (Rib): 1 1/8” (2.9 cm)
  • Repeat Plank 4.1: AC
  • Plank 4.2: ACACCACCC
  • Plank 4.3: BC
  • Plank 4.4: BCBCC
  • Repeat Width Plank 4.1: 1’-7 1/8” (48.6 cm) - Plank 4.2: 5’-0 3/4” (154.3 cm) - Plank 4.3: 10 1/8 in (25.7 cm) - Plank 4.4: 1’-9 3/8” (54.3 cm)
  • Maximum Plank Length 9’-0” (2.74 m)
  • Leather Types AD, AL, AQ, AU, CA, CO, CV, DE, DL, DT, DV, ES, ET, FE, HT, LC, LU, MA, MM, PT, RA, RU, SA, SL, SS, UM, VO, VP, VZ
  • Leather Colors Refer to Color Book for available colors
  • Leather Seams Seams are machine stitched at random intervals in matching thread color unless otherwise specified
  • Components Includes planks + Interlock Mounting System (wall screws not included)
  • Maintenance For finished leathers, wipe with a cool, damp cloth. For tougher soiling, use a pH-balanced soap and rinse. Repeat, if needed. For naked (aniline) leathers, wipe entire surface with a soft cloth and cool water to even out any abrasions or stains. Do not spot rub, for it will darken only that area. Other leather cleaners such as saddle soap or household cleaners that may contain harsh chemicals, alcohol or ink removers should never be used.
  • Lead Time Made to order and certain lead times will apply
  • Custom Custom configurations and seam options available—lengths beyond 9’-0” (2.74 m) must be quoted

Architecture Research Office

Founded in 1993, Architecture Research Office is led by Stephen Cassell, Kim Yao and Adam Yarinsky. ARO has earned a reputation for elegant, innovative and imaginative architecture born out of relentless exploration and engagement. Through investigation, analysis, and testing, Architecture Research Office creates designs that unite the conceptual and the pragmatic within a strong, compelling vision. This research-driven process enables the firm to operate on a wide variety of projects spanning strategic planning, architecture and urban design, and to craft elegant solutions to seemingly intractable problems.


  • Colorfastness to Light Varies—Refer to leather product page for complete specifications
  • Colorfastness to Crocking Varies—Refer to leather product page for complete specifications
  • Flammability Test reports available upon request
Part of the MillerKnoll collective