Material:NylonPacking list :2 pcs wheel(041-2D ,Couple) as photo and come with Screw Product features: wear resistant ,Sui .wang-edit-text .wang-edit-text .wang-edit-text 1It can be installed on the trunk to accelerate roller skating effect instead of damaged roller skating. 2These nylon luggage casters features light weight, easy to use, etc. 3Luggage caster wheels are quiet, wear resistant, exquisite workmanship, very practical, and is an important luggage maintenance accessory. 4The suitcase caster is easy to install, open the case, find the screw location, unscrew the screw, and screw on the new wheel. 5Wear resistant ,Suitable for the use of ordinary luggage box.