INWOO Flap Disc I Wheel Size:100mm (4')(150#) (x100 pack) Specification item model symbol Specification Specification item model symbol Specification information With auto switch D With auto switch Mounting support type B Basic type tube inner diameter 16 tube inner diameter 16mm cylinder stroke 55 dual stroke mark No dual stroke mark cylinder stroke 2 Cylinder stroke 2 None Cylinder additional symbol rubber cushion Port location on head cover 90° about axis rocking support bracket no metal fittings rod end bracket no metal fittings auto switch Without auto switch Auto switch additional symbol 2 with or without Auto switch mounting type B band attached Custom made specifications standard Model No : KP 1316(=IR 231C AP)