These fender mud flaps are cut from 1/16" thick Polyurethane Rubber and have very high durability and resistance against road grime, oils, and water.
The Short version is great for front fenders to protect your feet and drivetrain from water splashing up.
The Long version is often known as a "buddy" flap and are used to keep road grime and water off the faces of riders behind you - a necessity during group rides and brevets.
Price is per flap.
Made in house in Glen Burnie, Maryland.
Note: During installation, just snug up the bolts and nuts. Over-tightening might tear the rubber. You don't need to torque them down significantly - they'll stay put.