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![DU-BRO 1/2" Dia. with Retainer Micro Tail Wheel with Retainers - 12MTW - MPM Hobbies](http://mpmhobbies.com/cdn/shop/files/du-bro-12-dia-with-retainer-micro-tail-wheel-with-retainers-12mtw-mpm-hobbies_436x436.jpg?v=1709533101)
Our Micro Tail Wheels are available in two sizes: 3/8" (9.525 mm) and 1/2" (12.7 mm). Both sizes come complete with tail wheels (2) and micro wheel retainers (4) per package, with a weight of 1 gram each.