Peter Krause as Bobby wears Vuarnet VL1813 aviator sunglasses in the series 911.

The metal sunglasses look similar to Randolph Aviators or Ray-Ban Caravan but the top bar is different and goes all over the top, covering the lenses.

We can also identify this pair by the tiny V logo in the middle-top of the lens.

Unfortunately, these Vuarnet VL1812 sunglasses are not available anymore, but you can sometimes find one on eBay, including this one with blue lens ($260).

A very similar, but more rounded frame shape, is the Vuarnet VL1813, you can find one of those in a different color combination on eBay.

9-1-1 is an American procedural drama television series, starring Angela Bassett as Athena Grant-Nash, LAPD patrol sergeant and Peter Krause as Robert "Bobby" Nash, LAFD Station 118 captain, Athena's second husband (seasons 1–8).

Reference: Vuarnet Cap 1812