DSLR Shoulder Pad Mount For 15mm Rail Rod System Follow Focus 5D2 5D3 D90 T3i Material: Aluminum Alloy, Spongy Rubber. Dia: 15mm rods. The shoulder pad designed for more stable shoot movie, it is soft and comfortable, made of spongy rubber. The shoulder pad rod clamp is suitable for rodsupport rail system, follow focus support. package: 1* shoulder pad 1* holes lock 2 * 250mm rods of dia. 15mm