For JG™ sliding doors and windows there are three replacement parts: two adjustable carriage and acetal roller units, one with a plastic body and one in zinc-plated steel, plus a keyed window catch and spring. The same roller offered in two body materials is the useful detail. The plastic body is the like-for-like swap, and the zinc-plated steel version is the heavier option where a door has already chewed through a plastic one. Carriages and catch springs are what fail on this hardware; the frames outlast both. Before ordering, remove the old carriage and compare the body shape and screw fixing against the product images, and check whether your window catch takes a key, since a keyed catch and a non-keyed catch are not interchangeable.

Trademark notice: JG™ is a trademark of its owner. TradeBase Australia is an independent supplier of replacement hardware and is not affiliated with, endorsed by or authorised by the brand owner. Brand and model names appear on this page only to identify the windows and doors our parts are made to fit. Unless a listing states otherwise, the parts shown are aftermarket replacements manufactured to suit — not genuine JG™ parts.