They are made from plastic so they do flex a little. These do the following Radius.
Brand New Lamps Posts Metal & Plastic N Gauge Under 14 Years White LEDs
KATO Plastic N Gauge Tobu Railway Series 8000 Late Update Tojo Line
KATO Plastic N Gauge EF210 300 3092-1 Railway Model Electric locomotive blue
KATO Plastic N Gauge EF210 300 3092-1 Model Train Electric Locomotive Blue
Single Track Girder Bridge Deck Plastic N Gauge
