Safco Products Chair Arms for Metro Extended-Height Chair 3495 BL, Durable Polyurethane Construction, Height Adjustable CHAIR ACCESSORY. Chair Arms for Safco Metro Extended-Height Chair fit chair model 3442, sold separately. HEIGHT-ADJUSTABLE. Chair arm set features 3" height adjustment range for individual comfort. DURABLE DESIGN. Constructed with tough polyurethane for years of reliability. Manufacturer Limited Lifetime Warranty.