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Martec TK8300 Photoelectric Cell Kit Share: Universal sensing system upgrades commercial openers with photocell system Click to enlarge Part #: TK8300   Our Price: $51.75, List Price: $78.00 - Save: $26.25!   Our Price: $51.75, List Price: $78.00 - Save: $26.25! (min qty: 4)   Our Price: $51.75, List Price: $78.00 - Save: $26.25! (min qty: 10)       $5.95 Shipping DOMESTIC US - Click here for details   Qty: Universal remote photoelectric system for use with residential/commercial openers which have direct inout to their obstruction sensing system Provides the added feature of a non-contact reversing device when properly connected to t