Beginners can also install it easily to replace worn casters. ; 2 hex keys;1 Instruction Manual. Updated Kits Support Single and Dual Spinner Wheels-For Single Wheels,Wheel-housing Inner Width(W) 13/16in(21mm)≤W≤1 4/16in(32mm);For Dual Wheels,Wheel and Slot Shaft Total Width(W) 1 10/16in(42mm)≤W≤2 6/16in(60mm).
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