Protect photo eyes from impact misalignment. Improve durability and stability of Photo Eyes. Reduce warranty call backs. Improve user safety. Universal mount fits over most residential photo eye sensors; Universal left or right, sold as a pair. Installs quickly and easily to jamb or track. Vented design permits inspection of sensors. Made in the USA; recycled durable plastic. Dimensions: At Jamb: 4 in. x 8 in.; Body: 6 1/2 in. Projection from Jamb; 5 1/2 in. T, 4 3/4 in. W