MBL > Products > MBL Line > Powered wheelchairs > Tubes for powered wheelchairs Tubes for powered wheelchairs 2.50” – 3” tube straight Schrader valve 2.50” – 8” tube straight Schrader valve 2.80/2.50” – 4” tube straight Schrader valve 2.50” – 3” (210 x 65) tube straight Schrader valve 3.00” – 4” (260 x 85) tube straight Schrader valve 3.00” – 8” tube straight Schrader valve 3.00” – 8” tube straight Schrader valve 4.10/3.50” – 4” tube straight Schrader valve 4.10/3.50” – 5” tube straight Schrader valve 4.10/3.50” – 6” tube straight Schrader valve