Directional Discrete TGSI Polyurethane Single Stem $2.95 – $3.80 Directional discrete TGSI polyurethane has a specially designed top surface with smooth sides that reach the P5 slip rating. Suitable substrates for both the Warning and Directional TGSI include: Concrete (broomed & exposed), Bitumen, Timber, Vinyl, Carpet, Tiles & Pavers Installation method: Masonary drill and pressure fit. Core drill and pressure fit Select options This product has multiple variants. The options may be chosen on the product page