UNIWHEEL - Universal shower door roller. Unique patented design ( and trademark registered ). Fits top and bottom of shower doors. Fully adjustable for most hole locations and hole depths. Fits different thicknesses of glass 3mm-8mm. Made from solid stainless steel, very robust (no plastic or cast alloy or springs ). Fits corner entry, quadrant and straight shower doors. 3 different size wheels for more adaptabilty. Fits many different shower doors including:- April, Aquadart, Aqualux, Crosswater, Kudos, Lakes, Manhatton, Merlyn, Novellini, Oceana, Roman, Showerlux, Twyfords, Ultra