Color/Finish: Lifetime (PVD) Polished Brass Cylinder collar spacer for 1 3/8" thick doors for 8200 series deadbolts (2 1/8" prep) For installation on 1 3/8" (35mm) doors. Always used under Cylinder Collar. Two Rings are required for Double Cylinder functions. One Ring is required for Cylinder/Turn piece Functions. Finished to match deadbolt cylinder collar. Available at an extra charge.