Woodland Scenics ST1412 Sub Terrain, 2% Incline Starter 8 Pieces Incline Starters are wedges of high-density foam used to start your track on an incline or decline. Each piece in a package elevates/lowers the track to/from a designated number of inches within a 24" stretch, allowing for a smooth transition from one height to another. To install, pin in place with Foam Nails and attach with Foam Tack™ Glue or the Low Temp Foam Glue Gun and Glue Sticks. Use alone or with Risers. Each piece elevates from 0 - 1/2" (0 - 1.27 cm) within 24" (60.96 cm) and measures 2 1/2" w x 24" l (6.35 cm x 60.9 cm) White Rose Hobbies is proud to stock Woodland Scenics and other made in the USA products.