KoldLok ® 4" Round

Special Price $31.50 Regular Price $35.00
Quick Overview

Energy-efficient airflow management device designed to seal cable openings in new and existing raised floor systems. Split design allows the product to be installed or removed without disturbing cables. Self-drilling screws included. Overall size: 5.61" x 1.90". Cutout size: 4". Color: Black. Single unit.




Additional Information
Model K40001
Notes In Stock

KoldLok® Round is the premium choice for your facility. It features a revolutionary sealing technology which greatly reduces costly bypass airflow, increasing usable cooling unit capacity, and ensuring maximized efficiency from HVAC equipment.

  • The Split feature of the KoldLok Round 4″ allows product installation or removal without disturbing cables in the data center.
  • The Grommets contain no loose or partially fastened parts, which can become separated or fall through the raised floor
  • The Grommets are impact resistant and durable
  • HBT Membrane Layer
  • The Grommets satisfy NFPA 75 Section 5-4.4 requirement by self-dressing the raw metal edges of raised-floor tile cable cutouts
  • KoldLok products are compliant with Directive 2002/95/ EC of the European Parliament and the Council on the Restriction of the Use of Certain Hazardous Substances in Electrical and Electric Equipment (RoHS)
  • The Grommet features a membrane support structure


  • Supports increasing cabinet density
  • Increases existing cooling unit capacity
  • Reduces the need to purchase additional cooling units
  • Improves IT equipment reliability and extends equipment life
  • Increases static pressure under the raised floor
  • Improves volume of conditioned air delivery through perforated tiles and floor grates
  • Compliance with best practices for all raised floor cooling configurations (Hot and Cold Aisle, Hot Aisle Containment, Cold Aisle Containment)
  • Simple, installation saves time and labor and requires no downtime. Round grommets enable hole saw installation which reduces cutting time by over 50%
  • Durable ABS frame and Hybrid Brush sealing surface can be used for years
  • Hybrid Brush Technology (HBT)


Four (4) self-drilling screws are provided for installation


US unit of measure (Inches)

  • Overall size (diameter x height) 5.61" x 1.9"
  • Product height above floor .4"
  • Maximum cutout size sealed 4.125"
  • Usable cable area 9.6 sq. inch
  • Hole cut diameter 4”

Metric (Millimeters) (W x D): 

  • Overall size (diameter x height) 143mm x 48mm
  • Product height above floor .10mm
  • Maximum cutout size sealed 105 mm
  • Usable cable area 6,194 sq.mm
  • Hole cut diameter 102mm

The 4 R's of Airflow Management™

by Upsite Technologies