Really impressed with the quality of 'Rovan', (Rofun) products. Fitted my HPI desert truck perfectly. Took ten minutes to fit and 4 screws. There are two flaps that lap over the existing rear mounts to secure it tightly. Even allows for the wing to be re-mounted on your 5b. Is a little short on the sides for the wider rear wheels I have, but better than protrusion. Excellent, thick, flexible plastic. Especially the mud flaps which are very realistic. Also comes pre-fab, so no messing around. I live in Sydney and chose the 'couriers please' cheapest shipping option. Ordered a 5kg parcel and only cost $10. Made my order at lunchtime and was here the next day at 2pm. Wtf, quickest and cheapest delivery ever. Even get a free sticker with purchases. I couldn't be happier and only shop with these guys.... Cheers