The Dice Turret have added Tabletop Periscopes to their range of gaming accessories.
From their website:
We are now offering Tabletop Periscopes for your gaming pleasures. Each periscope is 5 3/4? x 3? x 2?. Has 2 plastic mirrors for true Line of Sight. Flames of War, Warhammer, Hordes, whatever your game, this is a must have. No more strings to check LoS. No laser pointers accidentally blinding your opponent. Just drop it in behind you figure. Make sure your enemy is within sight and Fire (roll) Away.