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 inch 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. 4% Incline/Decline Starters – 4/pkg – each piece elevates from 0 – 1″ (0 – 2.54 cm) within 24″ (60.96 cm) and measures 2 1/2″ w x 24″ l (6.35 cm x 60.9 cm)