Series 32 I-Beam Car – Saddle Top – Rubber Stand-Up Pad – 76mm(3″). Strong, stainless steel bodies with flared sides and angled ball bearing wheels provide high load capacity and smooth operation,Applications: Mainsheet and self-tacking jib travellers on boats to 9m (28ft), Materials: Black Chromed Grade 316 stainless steel car bodies, Grade 316 stainless steel wheels and fixtures , Specifications: Length: