Set of 4 New single wheel Shower Door Rollers (2 upper and 2 lower) Excellent quality Zinc alloy with chrome plated covers. Adjustable uppers sprung lowers 23mm X 6mm wheels For curved and quadrant showers, hole centres approx 26mm apart Quick dispatch usually the same day. Replacement shower door roller with23mm wheel diameter. This shower door roller is easy to make slide movement and is designed for use with 4-8 mm glass doors. The construction of the shower door roller brass and Plastic. Description: Easy Glide replacement shower door roller Suitable for most shower enclosures, shower cabins and steam cabin housing Designed to fit 4-8 mm glass Material: Zinc alloy with chrome plated covers. Package includes: 4x Shower Door Roller