Patio Door Roller Wheels Product 3/6 ← ↑ → Single Wheel Patio Door Rollers - Type 1 £16.95 Ex VAT£20.34 Inc VAT Qty: larger image larger image The height of the wheels can be adjusted by turning the lower screw on the side of the casing. Supplied with a new fixing screw to the top and side for easy installation. These roller wheels are supplied in twos; the price is for two. Model: WP-BG-CA-863 Manufactured by: UPVC Hardware