Need to refresh your roller shades without replacing the entire system?. White Blackout. Off-White Blackout. Bring yourroller tube with fabric still attached (no motor or brackets). Useimperial units with precision: round yourwidth (left to right) to the nearest:0.00", 1/8", 1/4", 3/8", 1/2", 5/8", 3/4", or 7/8" This ensures compatibility with our cutting process and a precise fit.