Stone Construction Equipment''s WolfPac™ Asphalt Rollers, WP4100, WP3100 and WP3100D, are available with optional foldable Roll-Over Protection (ROP). When folded to 73 inches, operator can back roller into garage/structure to get optimum coverage of area being compacted. Maintaining safety rating, foldable ROPs make rollers easier, less costly to transport on standard trailers.