XC20525

Frame Construction:

Back Sub-frame:

3/4" 16 gauge square steel tubing, flux-cored arc welded and mandrel-formed assembly.

Seat Sub-frame:

3/4" 16 gauge square steel tubing, flux-cored arc welded and mandrel-formed loop assembly with rear support bar.

Flex Device:

Flex device constructed using composite pultrusion springs tested to over 1 million flex cycles. Everflex system included in structural warranty.

Million Cycle Everflex

Legs:

1" 17 gauge radius edged square tubing for 6% more strength than standard 1" 16 gauge square tubing.

Stack Bars:

None. Stacks leg on leg, 8 high.

Torsion Bars:

5/16” diameter solid steel torsion rods for superior vibration absorption.

Steel Tubing:

Meets ASTM A-1008-03-CS-TYPE B/SAE-1010-AK
• 16 gauge wall thickness of .060" +/- 10%.
• 17 gauge wall thickness of .054" +/- 10%
• 18 gauge wall thickness of .048" +/- 10%

Welds:

28+ individual MIG welds

Bertolini Inc. frames are made from the strongest American steal in the seating industry. Frames are randomly tested for quality and durability. Bertolini exceeds all ANSI/BIFMA requirements. Bertolini regularly test to three or four times BIFMA standards to ensure the best in quality and performance.

Self-Tightening BosScrew™

Back Construction:

Back Attachment:

A slide-on Ergo-V back with multi-contoured V shape that supports the lower back while gently cradling the upper shoulders.

Inner Back:

Ergo-V with 1.5" thick 1.2 LB/CU.FT., flame retardant polyurethane foam. Meets CAL-117-2013 requirements.

Flex Back:

Exclusive Everflex flex-back system featuring 2 composite flex springs hidden under the chairs seat. Includes flex bumpers ensuring users a pinch-free experience. Surpasses all BIFMA requirements and standards. Cycle tested to over 1 million full flex cycles. Features dining pitch in upright position.

Ergo-V Back

Seat Construction:

Flex-fit blow molded seat made from post-industrial recycled plastic for the most environmentally friendly conference chair on the market. Seat offers double the break strength of a traditional wood or wood/webbed seat base while still offering a flexible base for comfort and foam life. Seat offers 1.5" of 3 LB/CU. FT. Density and ILD of 40 Lbs commercial grade American foam. Meets CAL-117 requirements.

Innovative Flex-Fit™ Seat

Hardware:

Glides:

Four Clear, Non-Corrosive, Ribbed and Double Booted Rocker Glides offered exclusively by Bertolini Inc. Self-leveling rocker glides eliminate the common failures of swivel-glides and are backed by a lifetime replacement guarantee.

Stack Buttons:

Friction-fit, non-rigid polymer stack buttons providing non-marring stacking assistance and support.

Variations to this Model include:

• XC20525A: with arms
• XC20125: non-flexback
• XC20505: inner back cushion without cutaway lumbar

Warranty:

20 Year Structural Frame Warranty, 10 Year Component Warranty. Glides for Life of your chair.