Precast concrete and treated class 3 Redwood (TRC3)., Precast concrete and treated class 4 Redwood (TRC4)., Precast concrete and treated class 3 Redwood - dark oak stain (TRC3-DO)., Precast concrete and treated class 4 Redwood - dark oak stain (TRC4-DO)., Precast concrete and hardwood Iroko (HI)., Precast concrete and RP-BK (recycled plastic black)., Precast concrete and RP-BR (recycled plastic brown).