Add to Cart Quick view Relay Controlled Crystal Deck for 20 Collins & Drake Crystals NEW Collins MSRP: Now: $49.99 Was: This Relay Controlled Crystal Deck for 20 Collins & Drake large Crystals, is new old stock, in the original box. It holds 20 crystals and uses 10, 28 VDC relays to switch them. The cover is held on with two retention clips. Just move... MSRP: Now: $49.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $49.99 Was: Subtotal: Add to Cart