Indasa Red Line 2 3/4" X 27 1/2 YD PSA (adhesive backed) aluminum oxide (A/O) sanding rolls. Heavy duty open coat C-weight paper backing. Indasa Redline Rynostick longboard abrasive shop rolls are a perfect solution for long board sanders. Premium Redline aluminum oxide (A/O) material delivers a smooth, long lasting cut. Cut rolls to length and use on any 2 3/4" long board sander.