The durable, tapered edge, steel base platform makes it easy to roll a patient onto the scale and quickly weight the patient. The wheelchair beam scale consists of a balance beam scale with ex-large 30" x 30" steel platform to accommodate oversized wheelchairs. The Ramp easily attaches to either side for left or right access. Rotating poise bars for weighing in pounds and kilograms. -Poise bar lock-in for error-free operation. -Permanent, engraved readings on poise bar for long-lasting readability. -Heavy-duty steel base for improved strength and durability. -Factory calibrated to ensure accuracy. -Includes two counterweights to increase capacity to 450 lbs or 200 kg. *2 Year Limited Warranty