2.4m diameter - this thing is huge! Thicker than Trident-II D5, Bulava and even M51.
Most definitely ICBM-ranged with ~3 ton MIRVed payload as shown in that old chart.
There's apparently a cool stream with lots of close-up shots of the launch tower, unfortunately it's only available for the live visitors' gallery. Wish they streamed it on Youtube:
Multiple photos/videos exist of downed YIHA/Asusguard models (including a pretty famous one of locals in Pakistan beating up the wreckage of a YIHA, thinking it's an Indian drone) so saying that not a single one was shot down is objectively not true.
The presentation lists how many locations...
First rail-based launch of Agni-1P MRBM! This significantly increases the number of potential launch points and makes pre-emptive destruction difficult.