Patio Door Roller Wheels Product 4/6 ← ↑ → Single Wheel Patio Door Rollers - Type 2 £15.95 Ex VAT£19.14 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-SRZ-S Manufactured by: UPVC Hardware