5ft by 4ft Tiger Tongue and Groove Pent Stable Door Storage Unit – Wooden Tongue and Groove Shelters. The Tiger Tongue and Groove Pent Stable Door represents a timeless pent design wooden shelter in high-quality tongue and groove panels. This uncomplicated yet highly sought-after garden structure is durable enough to withstand the test of time and will serve as a superb outdoor storage or workspace. 5ft by 4ft Tiger Tongue and Groove Pent Stable Door Storage Unit – Wooden Tongue and Groove Shelters