How much does this cost to the nearest dollar?

Safety Technology International, Inc. Steel Web Stopper, for Mini Smoke Detectors, Surface Mount, Protective Coated Steel Wire Guard
Safety Technology International, Inc. - STI 9605 Steel Web Stopper, for mini smoke detectors, surface mount, protective coated steel wire guard. UL Listed protector for areas where abuse to smoke detectors is severe. STI borrowed from nature's master builder the spider to create a patented web of protection from vandalism and accidental damage with this UL Listed wire guard. Highly recommended for areas where smoke detectors may be vandalized or accidentally damaged. Extremely difficult to break. Constructed of heavy coated steel wire with corrosion resistant polyester coating. Fast and easy installation. May be painted prior to installation to match detector. Easily removed to service smoke detector. For greater protection against vandalism

Price is $32.00
Price: $31.79