Heavy Duty Stencil No Parking Symbol. This stencil is 36" high. Made from Low Density Polyethelene (LDP) Stencils, our contractor professional grade stencil material is called Low Density Poly (LDP). This plastic is a solid 2mm extremely tough and highly durable product. Super flexible, it lies on the pavement like a carpet, contouring to the ground so when painting there is zero underspray for exact stencil painting. Durability is +1000s of paintings.